AZTEC SERVICE MANUAL

Lubrication Chart. PA-23-250 (six place). Serial Nos . ............................................ 27-2505 and up Inspection of Outboard Flap Hinge . Serial Nos . 27-3050 . ................................. 27-3 154 to 27-7405330 incl Fuel Selector Valve Control Cables. PA-23-235. PA-23-250 . and PA-23-250 (six place). Serial Nos . 27-2000 thru 27-7954076 ..... Fuel Selector Valve Control Cables. PA-23-250 (six place). Serial Nos . 27-7954077 and up .............................. Aileron and Flap Installation .................................. Fuselage Cradle .............................................. Wing Installation ............................................. Positioning of Front Spar Aligning Tool ........................ Aerofiche Grid No . I B6 PIPER AZTEC SERVICE M A N U A L Figure LIST OF ILLUSTRATIONS (cont) Aerof iche Grid No. .................................................................. Positioning of Main Spar Aligning Tool Emrennage Installation ........................................................................................ Windshield Installation. PA-23-250 and PA-23-235 ............................................. Windshield Installation. PA-23-250 (six place)..................................................... Slde Window Installation (Typical). PA.23.250. PA-23-235 and PA-23-250 (six place). Serial Nos. 27-2000 to 27-2504 incl.............................. Side Window Installation (Typical). PA-23-250 (six place). Serial Nos. 27-2505 and up ............................................................................... Emergency Exit Wlndow Installation. PA-23-250 (six place) ................................. Cabin Entrance Door Latch Assembly .................................................................. Typical Access Plates and Panels ........................................................................ Checking Stabilator Balance ................................................................................. . ...................................................................... Stabilator Balance WeigM Rework Checking Rudder Balance .................................................................................... Checking Aileron Balance ..................................................................................... Fuselage Frame Tubing ........................................................................................ Skin Materials and Thicknesses ........................................................................... Skin Materials and Thicknesses. PA-23-250 (six place) ....................................... Fabricated Tool. Wing Installation ......................................................................... Fabricated Tool. Wing Installation ......................................................................... Nose Cone Installation .......................................................................................... Removal of Nose Cone/ Radome ......................................................................... Nose Cone/Radorne ............................................................................................. Installation of Nose ConeIRadome ....................................................................... Surface Scratches. Abrasions or Ground-in-Dirt .................................................. Deep Scratches. Shallow Nicks and Small Holes................................................. Mixing or Epoxy Patching Compound .................................................................. Welding Repair Method ........................................................................................ Repairing of Cracks .............................................................................................. Various Repairs..................................................................................................... Repair of Stress Lines........................................................................................... Repair of Impacted Damage ................................................................................ Control Column Installation .................................................................................. Correct Method of Installing Rod End Bearing...................................................... Aileron Controls .................................................................................................... Installation of Aileron Bellcrank Rigging Tool ........................................................ Stabilator and Stabilator Trim Controls ................................................................. Stabilator Trim and Flap Interconnect System. PA-23-250. (six place). Serial Nos. 27-7654001 and up ....................................................... Leveling Stabilator. Serial Nos. 27-1 to 27-7554168 incl., and 27-80540001 and up .......................................................................................... ........................... Leveling Stabilator. Serial Nos. 27-7654001 to 27-7954121 incl Methods of Blocking Trim Cables ......................................................................... Rudder and Rudder Trim Controls ........................................................................ Clamping Rudder Pedals in Neutral ..................................................................... Installation of Rudder Aligning Tool ...................................................................... Trim Screw Assembly ......................................................................................... Flap Controls Installation ...................................................................................... ......................................................................................................... Flap Rigging PIPER AZTEC SERVICE MANUAL Figure LIST O F ILLUSTRATIONS (cont) Aerofiche Grid No . ............................... Fabricated Tool. Aileron Rigging Fabricated Tool. Stabilator Leveling. Serial Nos . 27-1 to 27-7554168 incl.. and 27-8054001 and up .................... Fabricated Tool. Stabilator Leveling. Serial Nos . 27-7645001 ......................................... to 27-7954121 incl ............................... Fabricated Tool. Rudder Rigging Fabricated Tool. Rudder Rigging. PA-23-250 (six place) "F'only ... Hydraulic System Schematic. PA.23.250. PA-23-235 and PA-23-250 (six place). Serial Nos . 27-2000 to 27-2504 incl...... Hydraulic System Installation. PA.23.250. PA-23-235 and . ...... PA-23-250 (six place). Serial Nos 27-2000 to 27-2504 incl Hydraulic System Schematic. PA-23-250 (six place). Serial Nos . 27-2505 to 27-4425 incl .. and 27-4427 to 27-4573 incl.......... Hydraulic System Installation. PA-23-250 (six place). Serial Nos . 27-2505 to 27-4425 incl.. and 27-4427 to 27-4573 incl.......... Hydraulic System Schematic. PA-23-250 (six place). Serial Nos . 27-4426 and 27-4574 to 27-7854050 incl...................... Hydraulic System Installation. PA-23-250 (six place). Serial Nos . 27-4426 and 27-4574 t o 27-7954121 incl...................... 'Hydrualic System Schematic. PA-23-250 (six place). Serial Nos .............................. 27-785405 1 to 27-7954 12 1 incl .Hydraulic System Installation PA-23-250 (six place). Serial Nos . 27-8054001 and up ................................... Hydraulic System Schematic PA-23-250 (six place). Serial Nos . ........................................ 27-8054001 and up Flow Diagram . Both Selector Levers Neutral ..................... Flow Diagram Landing Gear Selector Lever U p .................. Flow Diagram. Landing Gear Selector Lever Down ............... Flow Diagram. Flap Selector Lever Down ....................... Flow Diagram. Flap Selector Lever Up ......................... Hydraulic System Checking Diagrams. PA-23.250. PA.23.235. PA-23-250 (six place). Serial Nos . 27-2000 to .............................................. 27-2504 incl Hydraulic System Checking Diagrams. PA-23-250 (six place). Serial Nos . 27-2505 and up ................................ Hydraulic Pump. Exploded View ............................... Identification of Powerpak .................................... Location of Powerpak Components ............................. Hydraulic Powerpak. Exploded View . . . . . . . . . . . . . . . . . . . . . . Checking and Adjusting Powerpak ............................. Checking Powerpak Operation ................................. Hydraulic System Check Valve ................................. Anti-Retraction Valve ......................................... Adjustment of Anti-Retraction Valve ........................... Shuttle Valve ................................................ Nose and Main Landing Gear Actuating Cylinder ................ PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Figure Grid No . ....................................... Flap Actuating Cylinder ............................ Nose Gear Door Actuating Cylinder Main Gear Door Actuating Cylinder ............................ ........................................... Timer Check Valve ................................................ Priority Valve .............................................. Hydraulic Filter ........................ Emergency Gear Extender Cable Rigging ........................................... Bypass Flow Valve ............................... Fabricated Work and Test Stand Fabricated Hook ............................................. ..................................... Fabricated Hook. Double ................................ Nose Gear Oleo Strut Assembly Nose Landing Gear Installation ................................ Adjustment of Nose Gear Drag Link and Latch Assembly ......... ............................ Clamping Rudder Pedals in Neutral .................................. Rudder Pedals Neutral Angle ....................................... Aligning the Nose Gear Mechanical Nose Gear Door Mechanism. PA.23.250. PA-23-235 and PA-23-250 (six place). Serial Nos . 27-2000 to 27-2504 incl ...... Hydraulic Nose Gear Door Mechanism. PA-23-250 (six place). ................................ . Serial Nos 27-2505 and up ................................ Main Gear Oleo Strut Assembly .......................... Main Landing Gear Installation (Left) ......... Adjustment of Main Gear Drag Link and Latch Assembly .......................................... Aligning Main Gear Mechanical Main Gear Door Mechanism. PA.23.250. PA-23-235 and PA-23-250 (six place). Serial Nos . 27-2000 t o 27-2504 incl ...... Hydraulic Main Gear Door Mechanism. PA-23-250 (six place). ................................ Serial Nos . 27-2505 and up Deleted ..................................................... Deleted ..................................................... ...................... Adjustment of Nose Gear Up Limit Switch ...................... Adjustment of Main Gear Up Limit Switch Adjustment of Landing Gear Down Limit Switches ............... Landing Gear Warning Switches ............................... ......................................... Nose Wheel Assembly Main Wheel Assembly ........................................ ............................................ Brake Installation Wheel Brake Assembly (Typical) ............................... Wheel Brake Assembly. Latest Models of PA-23-250 (six place) .... Removal and Installation of Anchor Bolts ....................... ............................... Brake Master Cylinder Assembly ................................. Parking Brake Valve Assembly Bleeding Brakes .............................................. ............................. Nose Gear Oleo Service Tolerances PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Figure Aerofiche Grid No . ............................. Main Gear Oleo Service Tolerances ................ Fabricated Tool. Checking Nose Wheel Alignment Tire Balancer ................................................ ........................................ Cowl Flap Installation Propeller Installation. PA.23.250. PA-23-235 and PA-23-250 ................ . (six place). Serial Nos 27-2000 to 27-2504 incl ............................ Typical Nicks and Removal Method Propeller Installation. PA-23-250 (six place). Serial Nos . 27-2505and up ........................................... ........................................... Propeller Governor Engine Installation. PA.23.250. PA-23-235 and PA-23-250 (six place). Serial Nos . 27-2000 to 27-2504 incl................ Engine Installation. PA-23-250 (six place). Serial Nos . 27-2505 and up ........................................... .................................................. Carburetor Schematic of RSA Fuel Injection System ........................ ................................................. Fuel Injector Fuel Air Bleed Nozzle ......................................... ........................................... Magneto Inspection ..................................... Contact Spring Inspection ............................................ Impulse Coupling ....................................... Magneto Timing Marks Timing Pointer ............................................... .......................................... Timing Kit Installed .................. Breaker Compartment with Cast Timing Marks ......................................... Engine Timing Marks ..................................... Ignition System Schematic ........................ Removing Spark Plug Frozen to Bushing ........................ Adjustment of Ball Joint Exhaust System ........................................ Cowl Flap Installation......................................... Propeller Installation ............................ Typical Nicks and Removal Method ........................................... Propeller Governor ........................................... Engine Installation ........................ Schematic of RSA Fuel Injection System Fuel Injector ................................................. ......................................... Fuel Air Bleed Nozzle ............................................... Contact Points ..................................... Contact Spring Inspection Rotor Holding Tool Installed .................................. Timing Kit Installed .......................................... Aligning Timing Marks ....................................... Forming Leads in Breaker Compartment ........................ Engine Timing Mark .......................................... ........................................ MagnetoTiming Mark Removal of Spring From Lead Assembly ........................ Assembly Tool ............................................... PIPER AZTEC SERVICE MANUAL Figure LIST O F ILLUSTRATIONS (cont) Grid No . ........................................ Using Assembling Tool .............................. Measuring Lead Assembly Length ....................... Cutting Metallic Braid From End of Lead .................................. Unbraiding Metallic Shielding ............................. Forming Shielding Around Ferrule .......................................... Ferrule Seating Tool ...................................................... Needle .............................................. Measuring Wire ....................... Installing Grommet Over Lead Assemblies ........................... Lead Assembly Installed in Grommet .................... Wire Doubled Over for Installation of Eyelet ..................................... Ignition System Schematic ........................ Removing Spark Plug Frozen to Bushing ................................. Turbocharger System Diagram ........................................ Cowl Flap Installation ........................................... Engine Installation ................................. Turbocharger System Diagram Fuel System Diagram (2 Valves). PA-23-250 and PA-23-250 (six place). Serial Nos . 27-2000 to 27-2222 incl................ Fuel System Diagram. PA-23-235 and PA-23-250 (six place). .......................... Serial Nos . 27-2223 t o 27-2504 incl Fuel System Diagram. PA-23-250 (six place). Serial Nos . .................................... 27-2322 to 27-2504 incl Fuel System Diagram. PA-23-250 (six place). Serial Nos . ................... 27-2505 to 27-3836; 27-3838 to 27-3943 incl Fuel System Diagram. PA-23-250 (six place). Serial Nos . ......................... 27-3937. 27-3944 to 27-7554 172 incl Fuel System Diagram. PA-23-250 "F".Serial Nos . ........................................ 27-7654001 a n d u p Fuel System Diagram. PA-23-250 (six place). Serial Nos . ...................... 27-2582. 27-2686. 27-3 135 and 27-4520 ................................ Wing Tip Fuel Cell Installation Fuel Cell Installation. Serial Nos . 27-1 to 27-7654000 incl .......... Fuel Cell Installation. Serial Nos . 27-7654000 and up ............. ........................ Fuel Indicating System Wiring Schematic ................................... Check Fuel Quantity Sender Check Fuel Gauges Schematic ................................. ........................................... Fuel Selector Valve Fuel Selector Valve Installation. PA-23-250 and PA-23-250 (six p1ace);Serial Nos . 27-2000 to 27-2504 incl ................ .................................... Fuel Selector Valve (Scott) Fuel Selector Valve Installation. PA-23-235 and PA-23-250 (six place) . Serial Nos . 27-2223 t o 27-7305 126 incl ............. .............................. Fuel Selector Valve Port Positions PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Aerofiche Grid No . Fuel Selector Valve Installation. PA-23-235 and PA-23-250 ....................... (six place) (Dukes P I N 3654.00.1. -2) ......................................... Fuel Crossfeed Valve Fuel Filter. PA.23.235. PA-23-250 and PA-23-250 (six place). .......................... . Serial Nos 27-2000 to 27-2504 incl . ...... Fuel Filter. PA-23-250 (six place). Serial Nos 27-2505 and up .................... Bendix Electric Fuel Pumps (Early and Late) ................................... Weldon Rotary Fuel Pump ........................................ Shaft Seal Installation Bench Test Set-Up (Typical) ................................... Engine Primer ............................................... ............... Fabricated Fuel Quantity Transmitter Checking Jig Fuel Selector Control Cables. PA.23.235. PA.23.250. and PA-23-250 (six place). Serial Nos . 27-2000 thru 27-7954076 .............. Fuel Selector Control Cables. PA-23-250 (six place). Serial Nos: 27-7954077 and up ........................................ ..................... Instrument Panel. PA-23-250 and PA.23.235 Instrument Panel. PA-23-250 (six place). Serial Nos . .................................... 27-2000 to 27-2504 incl Instrument Panel. PA-23-250 (six place). Serial Nos. .................................... 27-2505 to 27-3 153 incl Instrument Panel. PA-23-250 (six place). Serial Nos . ............... 27-3154 to 27-3836 and 27-3838 to 27-3943 incl lnstmment Panel. PA-23-250 (six place). Serial Nos . ....... 27.3837. 27-3944 t o 27-4425 and 27-4427 t o 27-4573 incl Instrument Panel. PA-23-250 (six place). Serial Nos . ...................... 27-4426 and 27-4574 to 27-7554172 incl Dual Instrument Panel (Optional Equipment). PA-23-250 (six place). ......... Serial Nos . 27.7305222. 27-7405235 to 27-7554172 incl Instrument Panel. PA-23-250 (six place). Serial Nos . .............................. 27-755400 1 t o 27-7554 168 incl Instrument Panel (Typical). PA-23-250 (six place). ............................. Serial Nos . 27-7654001 and up . ........ Vacuum System. PA.23.250. Serial Nos 27-1 to 27-443 incl Vacuum System. PA.23.250. PA-23-235 and PA-23-250 (six place). .......................... Serial Nos . 27-2000 to 27-2504 incl Vacuum System. PA-23-250 (six place). Serial Nos . 27-2505 and up ........................................... Vacuum System. PA-23-250 (six place). Serial Nos . ................................... 27.3837. 27-3944 and up Vacuum System. Dual (Optional Equipment). PA-23-250 (six place). Serial Nos . 7305222 and 7405235 and up .......... Generator Wiring System Schematic ............................ Sectional View of Generator ................................... Wiring Circuit ............................................... PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Figure .................................... Current/ Voltage Regulator ...................... Use of Riffler File to Clean Contact Points .................................... Voltage Regulator Air Gap ............. Checking Voltage Setting .Fixed Resistance Method ........... Checking Voltage Setting .Variable Resistance Method ............................ Adjusting Voltage Regulator Setting ................... Cutout Relay Air Gap Check and Adjustments .............. Cutout Relay Point Opening Check and Adjustment ......................... Checking Cutout Relay Closing Voltage .................... Adjustment of Cutout Relay Closing Voltage ...................... Checking Current Regulator. Load Method Checking Current Regulator. Jumper Lead Method ............... ......................... Checking and Adjusting Relay Air Gap .................... Checking and Adjusting Relay Point Opening ................................ Checking Relay Closing Voltage ............................... Adjusting Relay Closing Voltage ............... Alternator System Wiring Schematic (Delco-Remy) ............................. Cross-Sectional View of Alternator .............................................. Checking Rotor ......................................... Slip Ring End Frame .............................................. Checking Stator Checking Diodes ............................................. ....................................... Brush Holder Assembly .......................... Exploded View of Heat Sink Assembly ...................................... Alternator Output Check .......................................... . Volt Ohmmeter Test ........................................... Jumper Connection............................................ Regulator Checks Relay Tests .................................................. .................................. Exploded View of Alternator ................................. Alternator Blast Tube Routing .................. Alternator System Wiring Schematic (Prestolite) .......................................... Removal of Rectifier ............................. Removal of Slip Ring End Bearing ................................... Removal of Drive End Head ................................. Removal of End Head Bearing .................................... Testing Rotor for Grounds ...................................... Testing Rotor for Shorts ........................................ installation of Bearing ........................................ Installation of Rectifier ........................................... Terminal Assembly ............................... Slip Ring End Bearing Assembly ............................................ Testing Alternator Aerofiche Grid No . PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Figure Aerofiche Grid No . ............................................ Brush Installation ...................................... Internal Wiring Diagram .................. Alternator Paralleling System Wiring Schematic ................................. Regulator Diagram (Prestolite) ................................... Regulator Diagram (Lamar) .................................. Testing Regulator (Prestolite) ..................................... Testing Regulator (Lamar) .................................. Adjusting Regulator (Lamar) ............................ Application of Over-Voltage Control .................................. Testing Over-Voltage Control ........................................ No-Load Test Hookup .................................... Lock-Torque Test Hookup ....................................... Resistance Test Hookup Exploded View of Gear Reduction Starting Motor ................ ........................... Turning Starting Motor Commutator ............................. Testing Motor Armature for Shorts Testing Motor Fields for Grounds .............................. ........................................ No-Load Test Hookup ......................................... Stall-Torque Hookup ............. Landing Light Installation. PA-23-250 and PA-23-235 ................. Landing Light Installation. PA-23-250 (six place) NOTE Electrical Schematics for Section XI. see Grid 4C5 . .............. Two Year. Magnesium Battery Connection (Garrett) ................ Five Year. Lithium Battery Connections (Garrett) Emergency Locator Transmitter Schematics (Garrett) ............. Emergency Locator Transmitter Schematic (Communications . Components Corp Early Models) .......................... Emergency Locator Transmitter Schematic (Communications . Components Corp Later Models) .......................... ............... Emergency Locator Transmitter Schematic (Narco) ......................... ELT Portable Folding Antenna (Narco) ...................... ELT Using Fixed Aircraft Antenna (Narco) .................................... Avionic Antenna Locations Heating and Ventilating System. PA-23-235 and PA.23.250. . .............................. Serial Nos 27-1 to 27-504 incl Heating and Ventilating System. PA-23-250 (six place). . Serial Nos 27-2000 to 27-2504 incl.......................... Heating and Ventilating System. PA-23-250 (six place). . . . . . . . . . . Serial Nos 27-2505 to 27.3049 27-305 1 to 27-3 153 incl PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Figure Aerofiche Grid No . Heating and Ventilating System. PA-23-250 (six place). Serial Nos . 27.3050. 27-3 154 to 27.3836. 27-3838 to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-3943 incl Heating and Ventilating System. PA-23-250 (six place). Serial Nos . 27.3837.2 7.3944 and up . . . . . . . . . . . . . . . . . Heating and Ventilating System. PA-23-250 (six place). Serial Nos . 244426 and 27-4574 and up . . . . . . . . . . . . . . . . . . Flow System (South Wind Heater) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel Safety Valve (Cutaway View) . . . . . . . . . . . . . . . . . . . Fuel Control Valve (Cutaway View) . . . . . . . . . . . . . . . . . . . . Wiring. Models 940-D and 94GDA Wiring. Models 940-DB and 940-K . . . . . . . . . . . . . . . . . . . . Heater Installation. PA-23-235 and PA-23-250 . . . . . . . . . . . . . Heater Installation. PA-23-250 (six place). Serial Nos . 27-2000 t o 27-2504 incl ..PA-23-250 (six place). Serial Nos . 27-2505 to 27.3049. 27-305 1 t o 27-3 153 incl . . . . . Flame Detector Switch (Cutaway View) . . . . . . . . . . . . . . . . . Exploded Parts View. Heater Assembly . . . . . . . . . . . . . . . . . . Exploded Parts View. Ventilating Air Blower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ventilating Air Blower Motor . . . . . . . . . . . . . . . . . . . . . . Combustion Air Blower Motor Detail of Exhaust Extensions Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel flow Test Set Up Heater Assembly and Combustion Air Blower . . . . . . . . . . . . . . . . . . Diagramatic Cutaway of Heater to Show Wirling Flame Action . . . . . . . . . . . . . . . . . . . . . Fuel Regulator and Shutoff Valve Top View .Duct Switch (Typical Control Lever Positions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . Primary Power Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . Starting Power Circuit . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Fixture Wiring .Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suggested Design for Seal Plate. Plugs and Caps for Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . Tube Leakage Test . . . . . . . . . . . . Test Set-Up for Combustion Air Pressure Switch Exploded View of Heater Assembly No . 751 978 and No . 751 999 . . Exploded View .Combustion Air Blower and Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No . 753 443 . . . . . . . . . . . . . . . Suggested Set-Up for Heater Operation Test . . . . . . . . . . . . . . Wiring connections for Heater Operation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heater Fuel Filter PIPER AZTEC SERVICE MANUAL LIST O F ILLUSTRATIONS (cont) Figure Aerofiche Grid No . ............................................ Heater Fuel Valve Heater Assembly and Combustion Air Blower .................... Diagramatic Cutaway of Heater to Show Whirling Flame Action ... Fuel Regulator and Shutoff Valve .............................. Top View .Duct Switch (Typical Control Lever Position) ......... .............................................. Wiring Diagram ........................................ Primary Power Circuit ........................................ Starting Power Circuit Spark Plug Gap Adjustment and Tool .......................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Fixture Wiring .Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suggested Design for Seal Plate Plugs and Caps for Combustion Tube Leakage Test ............................ Test Setup for Combustion Air Pressure Switch .................. Exploded View of Heater Assembly No . 755 257 ................. Exploded View of Combustion Air Blower and Motor . Assembly No . 758 304 .................................... Suggested Setup for Heater Operation Test ...................... Wiring Connection for Heater Operation Test .................... ................................... Oxygen Tubing Installations Oxygen System Installation. PA-23-250 ......................... Oxygen System Installation. PA-23-250 (six place). Serial Nos . 27-2000 to 27-3049 incl.. and 27-305 1 to 27-3153 incl ..................................................... Oxygen System Installation. PA-23-250 (six place). Serial Nos . 27-3154 to 27-3836 incl.. and 27-3838 to 27-3943 incl..................................................... Oxygen System Installation. PA-23-250 (six place). Serial Nos . 27-3837. 27-3944 and up .............................. ........................ Propeller De-Icer Installation. PA-23-250 .............. Propeller De-Icer Installation. PA-23-250 (six place) ............. Electrical Diagram Showing Cycle Sequence. Phase 1 ............. Electrical Diagram Showing Cycle Sequence. Phase 2 ............. Electrical Diagram Showing Cycle Sequence. Phase 3 ............. Electrical Diagram Showing Cycle Sequence. Phase 4 Relocating Bend in Deicer Lead ................................ ...................................... Determining Brush Wear ...................................... Determining Brush Wear .................................. Checking Slip Ring Run-Out .............................. Wear Pattern of Misaligned Brush ....................................... Brush Block Positioning Schematic Wiring Diagram. PA-23-250; PA-23-235; and PA-23-250 ................ . (six place). Serial Nos 27-2000 to 27-2504 incl Schematic Wiring Diagram. PA-23-250 (six place). Serial Nos . ........................................... 27-2505 and up PIPER AZTEC SERVICE MANUAL. LIST O F ILLUSTRATIONS (cont) Figure Brush Insert Assembly. PA-23-250; PA-23-235; and PA-23-250 (six place). Serial Nos . 27-2000 to 27-2504 incl................ Brush Block Assembly. PA-23-250 (six place). Serial ...................................... . Nos 27-2505 and up Holding Brushes for Soldering. PA-23-250; PA-23-235; and PA-23-250 (six place). Serial Nos . 27-2000 to .............................................. 27-2504incl Holding Brushes for Soldering. PA-23-250 (six place). ................................ Serial Nos . 27-2505 and up ...................................... Modular Brush Assembly .................................... Patching Deicer Lead Strap ..................................... Spinner Dome Cushioning ....................................... Hub Clamp Cushioning .................................. Propeller Blade in Low Pitch ............................. Propeller Blade in Feather Position Pneumatic Deicer Installation (Wet Vacuum Pump). Serial ................................ Nos . 27-2505 to 27-3944 incl Pneumatic Deicer Installation (Dry Vacuum Pump). Serial NOS. 27-45 10 to 27-7304963; 27-7304965 to ........................................... 27-7304993 incl Pneumatic Deicer Installation (Dry Vacuum Pump). Serial .......................... Nos . 27-7304964 t o 27-7554 168 incl Pneumatic Deicer lnstallation (Dry Vacuum Pump). Serial .......................... Nos . 27-7554 112 t o 27-7554 168 incl ............................. 28-Volt D C System. 3D 1472 Timer ............................. 14-Volt D C System. 3D 1740 Timer Pneumatic Deicer System Schematic (Using Time Module) ........ Pneumatic Deicer System Schematic (Airborne System) ........... ...................... Propeller Synchronizer System Installation ....................................... Synchronizer Schematic ....................................... Mechanical Connections .......................................... Fabricated Test Box ..................................... Synchrophaser Installation ................................................ Strobe Sensor Pulse Generator .............................................. .......................................... Computer Assembly .......................................... Fabricated Test Box .......................................... Electrical Schematic ......................... Strobe Sensor Internal Wiring Test Unit ...................................... Strobe Sensor Simulator Patch Cable and Test Terminal ................................. ..................................... Pulse Generator Simulator Synchrophaser Schematic. PA-23-250 (six place). Serial Nos . 27-7854068and up ........................................ Aerofiche aGrid No . INTENTIONALLY LEFT BLANK PIPER AZTEC SERVICE MANUAL LIST O F TABLES Table Aerofiche Grid No . Leading Particulars and Principle Dimensions ................. Consumable Materials ...................................... ................................ Flair Fitting Torques ................................. Recommended Nut Torques .................................. Conversion Tables Decimal/ Millimeter Equivalents of Drill Sizes .......... ............................................ Paint Materials Propeller Chamber Pressure Requirements with ........................................... Temperature Indicated Oxygen Cylinder Pressure vs . Ambient Temperature ........................................... Recommended Lubricating Oils .............................. .................................. Thread Lubricants .......................................... Inspection Report .............. List of Materials (Thermoplastic Repair) Control Surface Travel and Cable Tension .................... Troubleshooting Chart (Surface Controls) ..................... ........................ Leading Particulars. Hydraulic System Leading Particulars. Powerpak Assembly ...................... Inspection and Repair. Engine-Driven Hydraulic Pump ......... Special Tools and Test Equipment ............................ Hydraulic System Troubleshooting ........................... .................................. Powerpak Troubleshooting ........................................ Powerpak Parts List .................................... Powerpak Service Limits Wheel and Brake Wear Limits ............................... Landing Gear Oleo Service Tolerances 19273-02 ............................................. Nose Gear Landing Gear Oleo Service Tolerances 19272-02 ............................................ Main Gear Landing Gear and Brake System Troubleshooting .............. Propeller Specifications - PA-23-250; PA-23-235 and PA-23-250 (six place). Serial Nos . 27-2000 to ............................................ 27-2504 incl Propeller Specifications - PA-23-250 (six place). Serial Nos . 27-2505 and up .............................. ......................... Engine Troubleshooting (Carburetor) ..................................... Propeller Specifications Engine Troubleshooting (Fuel Injection) ....................... Engine Troubleshooting ..................................... ................................ Fuel System Troubleshooting Fuel System Pressures ...................................... Instrument Markings - PA-23-250; PA-23-235 and PA-23-250 (six place). Serial Nos . 27-2000 to 27-2504 incl. with Carburetor Induction System ............................ PIPER AZTEC SERVICE MANUAL LIST OF TABLES (cont) Table Instrument Markings .PA-23-250 (six place). Serial Nos . 27-2322 and up with Fuel Injected Induction System or ............................... AiResearch Turbocharger ................................. Instrument Troubleshooting ......................... . Index Electrical System Schematics .............................. Summary of Alternator Checks ............................ Electrical System Troubleshooting ................................... Lamp Replacement Guide ......................................... Circuit Load Chart ...................................... Electrical Wire Coding .......................................... Electrical Symbols ........................ Heater Troubleshooting (South Wind) ..................... Heater Troubleshooting (Janitrol) 14 Volt ..................... Heater Troubleshooting (Janitrol) 28 Volt ..................... Propeller Deicer System Troubleshooting ........................ Pneumatic Deicer Operating Pressures .................... Pneumatic Deicer System Troubleshooting ................ Troubleshooting Chart (Propeller Synchronizer) Troubleshooting Chart (Engine Synchrophaser) ................ Aerofiche Grid No . INTENTIONALLY LEFT BLANK Paragraph 1.1 . 1.2 . 1.3 . 1.4 . 1.5 . 1.6 . 1.7 . 1.8 . 1.9 . 1.10 . 1.11 . 1.12 . 1.13 . 1.14 . SECTION I INTRODUCTION Aerofic he Grid No . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . Scope of Manual Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuselage Wing . . . . . . . . . . . . . . . . . . . . . Empennage . . . . . . . . . . . . . . . . . . Flight Controls . . . . . . . . . . . . . . . . . Hydraulic System . . . . . . . . . . . . . . . . Landing G e a r . . . . . . . . . . . . . . . . . Engines and Propellers . . . . . . . . . . . . . . Fuel System . . . . . . . . . . . . . . . . . Instruments . . . . . . . . . . . . . . . . . Electronic Equipment . . . . . . . . . . . . . Heater and Ventilating System . . . . . . . . . . Reissued: 21 1 8 / 8 1 PIPER AZTEC SERVICE MANUAL SECTION I INTRODUCTION 1-1. GENERAL. This manual contains service and maintenance instructions for the Piper Aztec, PA-23-250, PA-23-250 (six place) and Apache PA-23-235 airplanes, designed and manufactured as a versatile aircraft in the Personal, Business and Military aviation field by the Piper Aircraft Corporation, Lock Haven, Pennsylvania. 1-2. SCOPE OF MANUAL. Sections I1 and I11 comprise the service part of this manual, whereas Sections IV through XIV comprise the maintenance instructions. The service instructions include ground handling, servicing and inspection. The maintenance instructions for each system include troubleshooting, removal and installation of components, and corrective maintenance and testing; each major system of the airplane is covered in a separate section. Only qualified personnel should perform the operations described in this manual. The description of the airplane included in this section is limited to general information. Section I1 gives leading particulars and principal dimensions, while each major system is described in its appropriate section of the manual. 1-3. DESCRIPTION. The Piper PA-23 series airplanes a r e a five o r six place, twin-engine, low-wing monoplane of all-metal construction. The following para- graphs provide descriptions of the major components and systems. 1-4. FUSELAGE. The fuselage, of truss and semi-monocoque type construction, is a combination of four basic units: The nose section, cabin section, tail sec- tion and a steel tubular frame, which extends from the tail section, through the cabin section, to the nose wheel. INTRODUCTION Reissued: 21 1818 1 PIPER AZTEC SERVICE MANUAL a 1-5. WING. The rectangular wing is of all-metal stressed skin, full cantilever, low-wing design, consisting of two wing panels bolted together a t the center of the fuselage. The wing tips a r e removable. The ailerons are cable and push rod controlled and a r e statically and dynamically balanced. The trailing edge type wing flaps a r e hydraulically operated. 1 - 6. EMPENNAGE. The empennage consists of the vertical stabilizer (fin), rudder with trim tab, and a horizontal stabalator . The control surfaces a r e dy- namically. and statically balanced. 1-7. FLIGHT CONTROLS. The flight controls a r e conventional equipment, con- sisting of a control wheel which operates the ailerons and stabilators and pedals f o r operating the rudder and brakes. Except for the brakes, duplicate controls a r e provided for the co-pilot . 1-8. HYDRAULIC SYSTEM. Two separate hydraulic systems a r e incorporated in the airplane. The main system incorporates a hydraulic Powerpak that oper- a t e s the landing gear and flaps. The second system operates the airplane's brake system . 1-9. LANDING GEAR. The tricycle landing gear system is hydraulically oper- ated and retractable with doors that cover the gear when retracted. The gear s t r u t s a r e air-oil type units. 1- 10. ENGINES AND PROPELLERS. The airplane is powered by two Avco- Lycoming six cylinder, direct drive, wet sump, horizontally opposed, fuel in- jected engines. The propellers a r e Hartzell full feathering, constant speed units controlled by a governor mounted on each engine. Each model with its engines and propellers a r e listed on the next page. INTRODUCTION Reissued: 2 / 1818 1 PIPER AZTEC SERVICE MANUAL NOTES: 1 . Propellers that may be used on these model planes include HC-E2YK-2RB. HC-E2YK-2RBS. HC-E2Y R-ZRB. HC-E2YR-2RBS, HC-E2Y R-2RBF. and HC-E2YR-2RBSF. OCTAIVE 91,96 See Note 2 91 196 See Note 2 80187 See Kote 2 91,96 See Kote 2 91/96 See Note 2 100' 130 See 'Vote 2 100' 130 See hote 2 2. For alternate fuel grade designations, see latest Avco Lycoming Service Instructions No. 1070. MODEL PA-23-250 14-Volt Electrical System PA-23-250 28-Volt Electr~cal System PA-23-235 PA-23-250 ( S I X place) Ser. Nos. 27-2000 to 27-2504 PA-23-250 (six place) Ser. Nos. 27-2505 and up (non-Turbo) PA-23-250 ( S I X place) Ser. Nos. 27-2505 and up w ~ t h A~ResearchTurbo Charger PA-23-250 (six place) Ser. Nos. 27-3944 and up with Lycoming Turbo Charger lnstallatlon INTRODUCTlOh: Reissued: 2/ 18;'8 1 PROPELLER HC-A2XK-2 HC-A2VK-2 or HC-82XK-2C I HC-A2XK-2 HC-A2VK-2 or HC-82XK-2C I HC-A2XK-2 or HC-A2VK-2 HC-A2XK-2 HC-A2VK-2 or HC-82XK-2C I See Note 1 Below See Note 1 Below See Note I Below EKGINE 0-540-A I B5 or 0-540-A I D5 0-540-A3D5 0-540-B I A5 0-540-A 1 D5 o r 10-540-C 1 B5 10-540-C4B5 10-540-J4A5 TIO-540-C 1 A H.P. 250 250 235 250 250 250 250 PIPER AZTEC SERVICE M A N U A L 1-1 1. FUEL SYSTEM. The fuel system consists of four bladder type fuel cells located in the wings with a total fuel capacity of 144 U.S. gallons. Aircraft with serial nos. 27-7654001 and up may have optional wing tip fuel cells which will increase the total fuel capacity to 184 U.S. gallons. Incorporated in the fuel system are fuel filters, electric auxiliary fuel pumps, engine driven pumps, and a crossfeed system. 1-1 2. INSTRUMENTS. Provisions for the instrument installation includes panels for engine instruments and advance flight instruments, as well as space for electronics equipment. The panel is shock mounted to minimize vibration to the instruments. 1-13. ELECTRONIC EQUIPMENT. Provision for electronic equipment includes various combinations of radio installations and Autopilot. 1-14. HEATER AND VENTILATING SYSTEM. The airplane's heater provides hot air for the cabin and for windshield defrosting. In conjunction with the heating system is the ventilating system which is used to cool the cabin and to furnish the heater with outside air. INTRODUCTION Reissued: 2; 1 8 / 8 1 SECTION I1 HANDLING AND SERVICING Paragraph Introduction .............................................................. ............................................................... Dimensions .................................................... Station Reference Lines Weight and Balance ........................................................ ....................................................... Serial Number Plate ............................................ Access and Inspection Provisions .................................................. Tools and Test Equipment Torque Requirements ...................................................... .......................................................... Torque Wrenches .......................................................... Ground Handling . 2- 1 1 Introduction t o Ground Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................................................... . 2- 12 Jacking ........................................................ . 2- 13 Weighing . ......................................................... 2- 14 Leveling ........................................................ . 2-15 Mooring .......................................................... . 2-16 Parking .......................................................... . 2.17 Towing .......................................................... . 2- 18 Taxiing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Power Receptacle 2.20 . Operation of External Power Receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................................................................. Cleaning 2-22 . Cleaning Engine Compartment ..................................... ............................................ . 2.23 Cleaning Landing Gear ......................................... 2.24 . Cleaning Exterior Surfaces 2.25 . Cleaning Windshield and Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.26 . Cleaning Headliner, Side Panels and Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................................................. 2.27 Cleaning Carpets 2.28 . Repainting (Polythane Enamel) ..................................... 2.29 . Scratch Touch-up on Aluminum Surface ............................. 2.30 . Coating Procedure for New Aluminum Panel . .................................................... Non-Alodized 2.31 . Coating Procedure for Alodized Aluminum .......................... 2.32 . Mixing Instructions for Primers and Topcoats ........................ 2.33 . V-48 Wash Primer ................................................ .................................................... . 2.34 Epoxy Primer 2.35 . Polytane 635 1 Primer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.36 . Mixing Instructions for Polytane Enamel ............................ 2.37 . Polytane Enamel all Colors ........................................ . ............................................... Standard Practices Airframe 2.39 . Cherrylock Rivets . Removal ........................................ 2.40 . Identification of Fluid Lines ........................................ 2.41 . Flareless .Tube Assemblies ........................................ . .................................................. 2.42 Support Clamps ................................................................. Servicing .......................................... 2.44 . Introduction to Servicing Aerofiche Grid No . Reissued: 21 1818 1 Aerofiche Grid 1Vo. Hydraulic System .......................................................... ........................................ 2.46 . Servicing Hydraulic System Powerpak Reservoir ....................................................... ................................ 2.48 . Filling Powerpak Reservoir (Gravity) 2.49 . Filling Powerpak Reservoir (Pressure) ............................... ...................................................... Landing Gear System ............................................ 2-5 1 . Servicing Landing Gear Oleo Struts ............................................................... .............................................. 2.53 . Servicing Oleo Struts ............................................ 2.54 . Adding Fluid to Struts ................................................ 2.55 . Filling Oleo Struts .............................................. 2.56 . Inflating Oleo Struts ............................................................. Brake System ............................................ 2.58 . Servicing Brake System 2.59 . Filling Brake Cylinder Reservoir .................................... ............................................ 2.60 . Draining Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tires ................................................... . 2.62 Servicing Tires .............................................................. Power Plant ............................................. . 2.64 Servicing Power Plant ........................................................ Induction Air Filter ............................... 2.66 . Removal and Installation of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.67 . Service Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Propeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.69 Servicing Propeller .............................................................. Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 1 . Servicing Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.72 . Filling Fuel Cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.73 . Draining Moisture from Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.74 . Draining Fuel System ............................................................ Oxygen System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.76 . Servicing Oxygen System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.77 Oxygen System Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.78 . Filling Oxygen Cylinder ............................................................... Lubrication ........................................................ Oil System (Engine) .............................................. 2-8 1 . Servicing Oil System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.82 Draining Oil Sump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.83 . Filling Oil Sump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.84 . Oil Screen (Pressure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.85 . Oil Filter . Full Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.86. Oil Screen (Suction) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.87 . Recommendations for Changing Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubrication Instructions Application of Oil ......................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application of Grease ......................................................... Lubrication Chart 1d13 1d13 ID 14 1d14 1d18 id18 1d18 1d19 1d19 1D20 1D20 1d21 1d21 1d21 1D21 1d21 1d21 1d21 1D22 1D22 1d22 1d22 1D23 1D24 1D24 IEl IEI 1 E 1 IEI IE 1 IEI IEl 1E2 1E3 1E4 1E4 1E4 1E4 1E5 1e5 1E5 1E6 1E6 1E7 1E7 1E7 1E8 Reissued: 21 1 81 8 1 INTENTIONALLY LEFT BLANK *PIPER AZTEC SERVICE MAlVUAL SECTION I1 HANDLING A N D SERVICING 2- 1 . INTRODUCTION. This section contains routine handling and servicing pro - cedures that a r e most frequently encountered. Frequent reference to this section will aid the individual by providing information such a s the location of various components, ground handling procedures, routine service procedures and lubri- cation. When any system o r component requires service other than the procedures a s outlined in this section, refer to the appropriate section for that component. 2-2. DIMENSIONS. The principle airplane dimensions a r e shown in Figures 2-1, 2-2 and 2-3 and a r e listed in Table 11-1. 2-3. STATION REFERENCE LINES. In order to facilitate the location of vari- ous components of the airplane which require maintenance and servicing, a method utilizing fuselage station (Sta. ), wing station o r buttock line (BL), and water line (WL) designations is frequently employed in this manual. (Refer to Figure 2-6. ) Fuselage stations, buttock lines, and water lines a r e reference points measured by inches in the vertical o r horizontal direction from a given reference line which indicates station locations of structural members of the airplane. The BL station 0 of the wing and stabilator is the center line of the airplane; and station 0 (WL) of the vertical stabilizer and rudder is 12 inches below the bottom edge of the forward left side window. NOTE F o r weight and balance purposes, refer to theairplane Flight Manual. The fuselage station reference lines and the datum lines (arm) are not the same. The ref- erence datum line o r a r m 0 is 6.25 inches forward of fuselage station 0. H A N D L I N G A N D SERVICING Reissued: 21 18/81 PIPER AZTEC SERVICE M A N U A L 2118 MRUONTAL REFERENCE UIY Figure 2- 1. Three-View of PA -23-250 and PA -23-235 HANDLING A N D S E R V I C I X G Reissued: 2 ' 181'8 1 P I P E R A Z T E C S E R V I C E M A N U A L Figure 2 - 2 . Three-View of PA -23-250 (six place) Serial Nos. 27-2000 to 27-2504 incl. H A N D L l N G A N D S E R V I C I \ G Reissued: 2 .! 18 .' 8 1 PIPER AZTEC SERVICE MANUAL i - Figure 2-3. Three-View of PA-23-250 (six place) Serial Nos. 27-2505 to 27-4573 incl. HANDLING AND SERVICING Reissued: 2 / 18 / 8 1 PIPER AZTEC SERVICE MANUAL Figure 2-4. Three-View of PA-23-250 (six place) Serial Nos. 27-4426 and 274574 to 27-7554168 incl. HAKDLING A N D SERVICISG Reissued: 2 / 18 : 8 1 *PIPER AZTEC SERVICE M A N U A L HOR12OMILL R L I . LIM Figure 2-5. Three-View o f PA-23-250 (six place) Serial Nos. 27-7654001 t o 27-7954121 incl. HANDLING A N D SERVICING Reissued: 2 / 1 8 / 8 1 *PIPER AZTEC SERVICE MANUAL Figure 2-6. Three-View of PA-23-250 (six place) Serial Nos. 27-8054001 and up HANDLING A N D SERVICING Reissued: 21 181 8 1 INTENTIONALLY LEFT BLANK *PIPER AZTEC SERVICE MANUAL TABLE 11-1. LEADING PARTICULARS AND PRINCIPLE DIMENSIONS HANDLING AND SERVICING Reissued: 2/ 1818 1 dB13 MODEL PA-23-250 PA-23-235 Avco-Lycoming 0-540-B 1 A5 295 235 2575 RPM See Table II-V 12 U.S. quarts 80187,16) MA-4-5 S6LN-204 S6LN-200 25 degrees BTC .018 2 .006 .O 18 +_ .006 EM-42E S-88 .018 to .022 1-4-5-2-3-6 1109511 ENGINE Manufacturer Model FAA Type Certificate Rated Horsepower Rated Speed: Full Throttle Turbocharger Power setting:,^) Turbo Cruise Oil S.A.E. Number Oil Sump Capacity Fuel, Aviation Grade, Minimum Octane Carburetor, Marvel-Schebler Fuel Injector Bendix Magnetos, Scintilla: Right Left Magneto Timing Magneto Point Clearance: Main Retard Retard Angle Spark Plugs, Shielded: C b m p i o n AC Spark Plug Gap Settingis, Firing Order Starter, Delco-Remy: 14-Volt 28-Volt Starter, Prestolite: 14-Volt 28-Volt REFER TO GRID lB2O FOR FOOTNOTE - Avco-Lycoming 0-540-A 1B5, 0-540-A 1 D5 or 0-540-A3D5 295 250 2575 RPM See Table II-V 12 U.S. quarts 91/96 MA-4-5 S6LN-21 ( I ) / S6LN-2040)(1) S6LN-21 ,I)/ S6LN-2000)(1, 25 degrees BTC .018 5 .006 .018 2 .006 REM-40E SR-88 .018 to .022 1-4-5-2-3-6 1109688(1)/1 10951 1 c 2 ) 1 10969611) LEGEND *PIPER AZTEC SERVICE MANUAL TABLE 11-1. LEADING PARTICULARS AND PRINCIPLE DIMENSIONS (cont) Ito 27-2504 incl. - l a n d u p I MODEL FAA Type Certificate Rated Horsepower Rated Speed: Full Throttle Turbocharger Power setting:^, Turbo Cruise Oil S.A.E. Number Oil Sump Capacity Fuel, Aviation Grade, Minimun Octane Carburetor, Marvel-Schebler Fuel Injector Bendix Magnetos, Scintilla: Right Left Magneto Timing Magneto Point Clearance: Main Retard Retard Angle Spark Plugs, Shielded: Champion AC Spark Plug Gap Setting(*) p~-23-250(six placeJ PA-23-250 (six place) Ser. Nos. 27-2000 iSer. Nos. 27-2505 and up ENGINE 2575 RPM PA-23-250 (six place) Ser. Nos. 27-3944 See Table 11-V 12 U.S. quarts Avco-Lycoming TIO-540-C 1 A S6LN-204 S6LN-200 25 degrees BTC Avco-Lycoming 10-540-C4B5 or 10-540-J4A5 Manufacturer M ode1 Avco-Lycoming 0-540-A 1D5 or 10-540-C 1B5 2575 RPM Firing Order Starter, Delco-Remy: 14-Volt 1 28-Volt Starter, Prestolite: 14-Volt 28-volt 1-4-5-2-3-6 1109511 2400 RPM @ 28.5 in.(6) See Table 11-V 12 U.S. quarts 2400 RPM @ 34.0 in. See Table 11-V 12 U.S. quarts S6LN-204(5)/S6LN- 1209(6) S6LN-200(s)/S6LN-1208(6) 25 degrees BTC I REFER TO G R I D IB20 FOR FOOTNOTE LEGEXD S6L'Irj-1209 S6LN- 1208 25 degrees BTC ? REM-40Ecs)lREB-37N(6) SR-88(s)/AC 17l(6) .018 to .022(5~ .o15 to . 0 2 1 ( ~ ~ 145-2-3-6 I HAKDLING A N D SERVlClN REB 37N AC171 .015 to .021 1-4-5-2-3-6 Reissued: 2 / 18;'81 *PIPER AZTEC SERVICE MANUAL TABLE 11-1. LEADING PARTICULARS AND PRINCIPLE DIMENSIONS (cont) HANDLING AND SERVICING Reissued: 21 1818 1 lB15 MODEL PA-23-250 PA-23-235 ENGINE (cont) Generator, Delco-Remy: 14-Volt 28-Volt Voltage Regulator, Delco-Remy: 14-Volt 28-Volt Paralleling Relay, Delco-Remy: 14-Volt 28-Volt Alternator, Delco-Remy: 14-Volt 28-Volt Voltage Regulator, Delco-Remy: 14-Volt 28-Volt Overvoltage Relay. Delco-Remy: 14-Volt 28-Volt Alternator, Prestolite: 14-Volt 28-Volt Voltage Regulator, Prestolite: 14-Volt 28-Volt Voltage Regulator, LAMAR: 14-Volt 28-Volt Overvoltage Relay, Prestolite: 14-Volt 28-Volt Fuel Pump Drive R E F E R TO G R I D IB20 FOR FOOTFiOTE PA-23-250 (six place) Ser. Nos. 27-2000 to 27-2504 incl. 1101915 (50 amp) 1119246 (50 ~ m p ) 1 116887 (50 amp) Plunger type 1101915 (50 amp)(1)(2) 1101905 (25 amp)(,, 11 19246 (50 amp)(I , (2, 1 1 18976 (25 amp)(,) 1116887 (50 amp)(1 ) ( 2 ) 1 116902 (25 amp)(,, Plunger type LEGEND 1101915 (50 amp) 1105055 (50 amp) 1119246 1119656 1116887 11 16902 Plunger type *PIPER AZTEC SERVICE MANUAL TABLE 11-1. LEADING PARTICULARS AND PRINCIPLE DIMENSlONS (cont) Generator, Delco-Remy: 14-Volt 28-Volt Voltage Regulator, Delco-Remy: 14-Volt 28-Volt Paralleling Relay, Delco-Remy: 14-Volt 28-Volt Alternator, Delco-Remy: lCVolt 28-Volt Voltage Regulator, Delco-Remy: 14-Volt 28-Volt Overvoltage Relay, Delco-Remy: 14-Volt 28-Volt Alternator, Prestolite: 14-Volt 28-Volt Voltage Regulator, Prestolite: 14-Volt 28-Volt Voltage Regulator, LAMAR: 14-Volt 28-Volt Overvoltage Relay, Prestolite: 14-Volt 28-Volt Fuel Pump Drive 1100660 or 1100717 (70 amp) 1100718 (50 amp) 9000590 9000591 1115831 1115832 ALX 8403 (70 amp) 14V ALU 8403 (70 amp) 28V VSF 7203-7A VSF 7403 PA-23-250 (six place) Ser. Nos. 27-3944 and up MODEL X 17621 X 17620 Plunger type(5) Lear Siegler #RG- 17980~j) PA-23-250 (six place) Ser. Nos. 27-2505 and up ALX 8403 (70 amp) 14V ALU 8403 (70 amp) 28V IVSF 7203-7A VSF 7403 X 17621 X 17620 Lear Siegler #RG- 17980 I REFER TO GRID 1820 FOR FOOTUOTE LEGEND II HANDLING AND SERVICING 'aReissued: 21 18/81