AIRPLANE FLIGHT MANUAL SUPPLEMENT NO. 045-1 FOR BEECHCRAFT 200 AND 300 SERIES AIRPLANES WITH CENTEX AEROSPACE SADDLE TANKS CONVERSION

2-5 ........................................................................................................ May 2019 2-6 ................................................................................................... January 2016 3-1 thru 3-2 ................................................................................ September 2014 3A-1 thru 3A-2 ........................................................................... September 2014 4-1 thru 4-2 ................................................................................ September 2014 4-3 ........................................................................................................ May 2019 4-4 .............................................................................................. September 2014 5-1 thru 5-2 ................................................................................ September 2014 6-1 ................................................................................................... January 2016 6-2 .............................................................................................. September 2014 6-3 thru 6-8 ..................................................................................... January 2016 7-1 .................................................................................................... August 2017 7-2 ..................................................................................................... March 2015 7-3 ................................................................................................... January 2016 7-4 thru 7-5 .......................................................................................... May 2019 7-6 .................................................................................................... August 2017 7-7 ........................................................................................................ May 2019 7-8 ..................................................................................................... March 2019 7-9 ................................................................................................... January 2016 7-10 thru 7-11 ...................................................................................... May 2019 7-12 .................................................................................................. August 2017 7-13 ...................................................................................................... May 2019 REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 1 AIRPLANE FLIGHT MANUAL SUPPLEMENT GENERAL MAY 2019 1-5 PAGE VERSION DATE 7-14 .................................................................................................. August 2017 7-15 ................................................................................................... March 2019 7-16 thru 7-17 .................................................................................. August 2017 7-18 thru 7-19 ...................................................................................... May 2019 7-20 .................................................................................................. August 2017 7-21 ...................................................................................................... May 2019 7-22 .................................................................................................. August 2017 7-23 ................................................................................................... March 2019 7-24 .................................................................................................. August 2017 8-1 thru 8-2 ................................................................................ September 2014 REFERENCE ONLY SECTION 1 CENTEX AEROSPACE 045-1 GENERAL AIRPLANE FLIGHT MANUAL SUPPLEMENT MAY 2019 1-6 LOG OF REVISIONS Initial Release September 11, 2014 Includes pages dated September 2014 APPROVED BY: S. Frances Cox, Manager, ASW-190 Revision 1 March 27, 2015 Includes pages dated March 2015 APPROVED BY: Scott A. Horn, Manager, ASW-140 Revision 2 January 20, 2016 Includes pages dated January 2016 APPROVED BY: John Hardie, Acting Manager, ASW-140 Revision 3 September 7, 2017 Includes pages dated August 2017 APPROVED BY: Eric Kinney, Manager, AIR-713 Revision 4 May 31, 2019 Includes pages dated March 2019 APPROVED BY: Charlie Roberts for Manager, AIR-713 Revision 5 May 31, 2019 Includes pages dated May 2019 APPROVED BY: Charlie Roberts for Manager, AIR-713 REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 2 AIRPLANE FLIGHT MANUAL SUPPLEMENT LIMITATIONS JANUARY 2016 2-1 SECTION 2 LIMITATIONS TABLE OF CONTENTS SUBJECT PAGE INTRODUCTION .................................................................................. 2-3 OTHER LIMITATIONS ....................................................................................... 2-3 PLACARDS ..................................................................................................... 2-4 REFERENCE ONLY SECTION 2 CENTEX AEROSPACE 045-1 LIMITATIONS AIRPLANE FLIGHT MANUAL SUPPLEMENT MARCH 2015 2-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 2 AIRPLANE FLIGHT MANUAL SUPPLEMENT LIMITATIONS AUGUST 2017 2-3 INTRODUCTION The limitations shown in this section are approved by the Federal Aviation Administration and must be observed while operating Beechcraft King Air 200, A200, B200, 300 and B300 series airplanes that have been modified by the CenTex Aerospace Saddle Tank Conversion STC. This STC approves the installation of a set of auxiliary fuel tanks that have a total capacity of 190 US gallons for the ST190 Saddle Tanks, 120 US gallons for the ST120 Saddle Tanks, and 72 US gallons for the ST72 Saddle Tanks. King Air models 200CT, 200T, A200CT, B200CT, and B200T are limited to the airplane configuration with the wing-tip fuel tanks removed and optional wing tips installed. Do not operate the aircraft with the 53-gallon tip tanks installed. USABLE FUEL LIMITS Maximum Usable Fuel Quantity (with ST190 tanks) ........................ 734 gallons Maximum Usable Fuel Quantity (with ST120 tanks) ........................ 664 gallons Maximum Usable Fuel Quantity (with ST72 tanks) .......................... 616 gallons OTHER LIMITATIONS (Airplanes with Saddle Tanks installed) ST190 1. Both left and right main and auxiliary tanks must be full of fuel before fuel can be added to the Saddle Tanks. 2. Maximum allowed fuel imbalance between left and right side Saddle Tanks is 300 pounds (45 gallons). ST120 1. Both left and right main and auxiliary tanks must be full of fuel before fuel can be added to the Saddle Tanks. 2. Maximum allowed fuel imbalance between left and right side Saddle Tanks is 100 pounds (15 gallons). 3. Maximum weight of cargo carried inside each ST120 Saddle Tank storage compartment is 100 pounds. ST72 1. Both left and right main and auxiliary tanks must be full of fuel before fuel can be added to the Saddle Tanks. 2. Maximum allowed fuel imbalance between left and right side Saddle Tanks is 100 pounds (15 gallons). 3. Maximum weight of cargo carried inside each ST120 Saddle Tank storage compartment is 150 pounds. WARNING REFERENCE ONLY SECTION 2 CENTEX AEROSPACE 045-1 LIMITATIONS AIRPLANE FLIGHT MANUAL SUPPLEMENT JANUARY 2016 2-4 PLACARDS 1. On top of each ST190 Saddle Tank adjacent to the fuel filler cap; or, on top of each ST120 Saddle Tank adjacent to the fuel filler cap. or, on top of each ST72 Saddle Tank adjacent to the fuel filler cap. SADDLE TANK FUEL USE JET FUEL SEE PILOTS OPERATING MANUAL FOR FUEL DESIGNATIONS CAPACITY 95 U.S. GAL WITH WINGS LEVEL MAIN & AUXILIARY TANKS MUST BE FULL BEFORE FILLING SADDLE TANKS SADDLE TANK FUEL USE JET FUEL SEE PILOTS OPERATING MANUAL FOR FUEL DESIGNATIONS CAPACITY 60 U.S. GAL WITH WINGS LEVEL MAIN & AUXILIARY TANKS MUST BE FULL BEFORE FILLING SADDLE TANKS SADDLE TANK FUEL USE JET FUEL SEE PILOTS OPERATING MANUAL FOR FUEL DESIGNATIONS CAPACITY 36 U.S. GAL WITH WINGS LEVEL MAIN & AUXILIARY TANKS MUST BE FULL BEFORE FILLING SADDLE TANKS REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 2 AIRPLANE FLIGHT MANUAL SUPPLEMENT LIMITATIONS MAY 2019 2-5 2. Vent line drain valve. On underside of wing outboard of main landing gear fairing. 3. Sump drain valve On inboard rear side of ST190 Saddle Tanks Or, on underside of wing inboard of main landing gear fairing below ST120 or ST72 Saddle Tanks 4. Fuel line drain valve (drain valve no longer installed, placard deleted) FUEL DRAIN FUEL DRAIN REFERENCE ONLY SECTION 2 CENTEX AEROSPACE 045-1 LIMITATIONS AIRPLANE FLIGHT MANUAL SUPPLEMENT JANUARY 2016 2-6 5. On inside of ST120 Saddle Tank storage door. Or, on inside of ST72 Saddle Tank storage door. 6. On top of each auxiliary tank adjacent to the fuel filler cap. COMBINED WEIGHT OF CARGO MUST NOT EXCEED 100 POUNDS CARGO MUST BE SECURELY FASTENED BEFORE FLIGHT DO NOT LEAVE DOOR UNLATCHED LATCH DOOR WHEN CLOSED COMBINED WEIGHT OF CARGO MUST NOT EXCEED 150 POUNDS CARGO MUST BE SECURELY FASTENED BEFORE FLIGHT DO NOT LEAVE DOOR UNLATCHED LATCH DOOR WHEN CLOSED CAUTION DO NOT OPEN AUX TANK CAP IF THERE IS FUEL IN THE SADDLE TANKREFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 3 AIRPLANE FLIGHT MANUAL SUPPLEMENT EMERGENCY PROCEDURES SEPTEMBER 2014 3-1 SECTION 3 EMERGENCY PROCEDURES NO CHANGES See the basic Beechcraft Airplane Flight Manual or Pilot Operating Handbook for Emergency Procedures. REFERENCE ONLY SECTION 3 CENTEX AEROSPACE 045-1 EMERGENCY PROCEDURES AIRPLANE FLIGHT MANUAL SUPPLEMENT SEPTEMBER 2014 3-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 3A AIRPLANE FLIGHT MANUAL SUPPLEMENT ABNORMAL PROCEDURES SEPTEMBER 2014 3A-1 SECTION 3A ABNORMAL PROCEDURES NO CHANGES See the basic Beechcraft Airplane Flight Manual or Pilot Operating Handbook for Abnormal Procedures. REFERENCE ONLY SECTION 3A CENTEX AEROSPACE 045-1 ABNORMAL PROCEDURES AIRPLANE FLIGHT MANUAL SUPPLEMENT SEPTEMBER 2014 3A-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 4 AIRPLANE FLIGHT MANUAL SUPPLEMENT NORMAL PROCEDURES SEPTEMBER 2014 4-1 SECTION 4 NORMAL PROCEDURES TABLE OF CONTENTS SUBJECT PAGE PROCEDURES BY FLIGHT PHASE PREFLIGHT INSPECTION ........................................................................ 4-3 REFERENCE ONLY SECTION 4 CENTEX AEROSPACE 045-1 NORMAL PROCEDURES AIRPLANE FLIGHT MANUAL SUPPLEMENT SEPTEMBER 2014 4-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 4 AIRPLANE FLIGHT MANUAL SUPPLEMENT NORMAL PROCEDURES MAY 2019 4-3 PROCEDURES BY FLIGHT PHASE Steps marked with an * may be omitted except for first flight of the day and after adding fuel to the Saddle Tanks. PREFLIGHT INSPECTION Add the following steps. COCKPIT After Fuel Quantity (main & auxiliary)…..CHECK Saddle Tanks Fuel Quantity Indicators ..................... CHECK FUEL QUANTITY LEFT WING Saddle Tank Filler Cap ........................................................................ SECURE * Saddle Tank Sump ............................................................................... DRAIN * Saddle Tank Vent Line ......................................................................... DRAIN Airplanes with ST120 or ST72 Saddle Tanks Saddle Tank Storage Door ......................................... CLOSED AND LATCHED RIGHT WING Saddle Tank Filler Cap ........................................................................ SECURE * Saddle Tank Sump ............................................................................... DRAIN * Saddle Tank Vent Line ......................................................................... DRAIN Airplanes with ST120 or ST72 Saddle Tanks Saddle Tank Storage Door ......................................... CLOSED AND LATCHED Do not open the auxiliary tank cap if there is fuel in the Saddle Tank. Opening the cap and the anti-siphon valve (flapper) can result in fuel flowing out of the auxiliary tank if the Saddle Tank contains fuel. NOTE Refer to all applicable Supplements for flight phase procedures for optional equipment installed in the airplane. The procedures listed below are required for airplanes modified by the installation of the CenTex Aerospace Saddle Tanks STC. CAUTION REFERENCE ONLY SECTION 4 CENTEX AEROSPACE 045-1 NORMAL PROCEDURES AIRPLANE FLIGHT MANUAL SUPPLEMENT SEPTEMBER 2014 4-4 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 5 AIRPLANE FLIGHT MANUAL SUPPLEMENT PERFORMANCE SEPTEMBER 2014 5-1 SECTION 5 PERFORMANCE NO CHANGES See the basic Beechcraft Airplane Flight Manual or Pilot Operating Handbook for Performance Data. REFERENCE ONLY SECTION 5 CENTEX AEROSPACE 045-1 PERFORMANCE AIRPLANE FLIGHT MANUAL SUPPLEMENT SEPTEMBER 2014 5-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 6 AIRPLANE FLIGHT MANUAL SUPPLEMENT WEIGHT & BALANCE JANUARY 2016 6-1 SECTION 6 WEIGHT AND BALANCE TABLE OF CONTENTS SUBJECT PAGE ST190 SADDLE TANKS WEIGHT AND MOMENT TABLE KING AIR 200 SERIES AND KING AIR 300 ......................................... 6-3 KING AIR B300 (350) ....................................................................... 6-3 USABLE FUEL ........................................................................................... 6-4 UNUSABLE FUEL ...................................................................................... 6-4 UN-DRAINABLE FUEL............................................................................... 6-4 ST120 SADDLE TANKS WEIGHT AND MOMENT TABLE KING AIR 200 SERIES AND KING AIR 300 ......................................... 6-5 KING AIR B300 (350) ....................................................................... 6-6 USABLE FUEL ........................................................................................... 6-6 UNUSABLE FUEL ...................................................................................... 6-6 UN-DRAINABLE FUEL............................................................................... 6-6 ST72 SADDLE TANKS WEIGHT AND MOMENT TABLE KING AIR 200 SERIES AND KING AIR 300 ......................................... 6-7 KING AIR B300 (350) ....................................................................... 6-8 USABLE FUEL ........................................................................................... 6-8 UNUSABLE FUEL ...................................................................................... 6-8 UN-DRAINABLE FUEL............................................................................... 6-8 REFERENCE ONLY SECTION 6 CENTEX AEROSPACE 045-1 WEIGHT & BALANCE AIRPLANE FLIGHT MANUAL SUPPLEMENT SEPTEMBER 2014 6-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 6 AIRPLANE FLIGHT MANUAL SUPPLEMENT WEIGHT & BALANCE JANUARY 2016 6-3 ST190 SADDLE TANKS WEIGHT AND MOMENT TABLE The table below provides the weight and moment of fuel carried in the Saddle Tanks. Use this weight and moment information when calculating the aircraft weight and balance. King Air 200 Series and King Air 300 Fuel per Tank Gallons Total Fuel Gallons Total Weight * Pounds Moment * Inch-lbs/100 5 10 67 168 10 20 134 329 20 40 268 635 30 60 402 943 40 80 536 1246 50 100 670 1545 60 120 804 1840 70 140 938 2133 80 160 1,072 2425 90 180 1,206 2715 95 190 1,273 2860 King Air B300 (350) Fuel per Tank Gallons Total Fuel Gallons Total Weight * Pounds Moment * Inch-lbs/100 5 10 67 178 10 20 134 348 20 40 268 674 30 60 402 1001 40 80 536 1323 50 100 670 1641 60 120 804 1956 70 140 938 2268 80 160 1,072 2579 90 180 1,206 2889 95 190 1,273 3044 * Based on Jet-A turbine fuel at 6.7 lbs/gal. REFERENCE ONLY SECTION 6 CENTEX AEROSPACE 045-1 WEIGHT & BALANCE AIRPLANE FLIGHT MANUAL SUPPLEMENT JANUARY 2016 6-4 ST190 King Air 200 Series, King Air 300, and King Air B300 (350) USABLE FUEL PER TANK 95 Gallons UNUSABLE FUEL PER TANK 0.7 Gallons UN-DRAINABLE FUEL PER TANK 0.15 Gallons - ST120 and ST72 Saddle Tanks Information Continued On Following Pages - REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 6 AIRPLANE FLIGHT MANUAL SUPPLEMENT WEIGHT & BALANCE JANUARY 2016 6-5 ST120 SADDLE TANKS WEIGHT AND MOMENT TABLE The tables below provide the weight and moment of fuel and cargo carried in the ST120 Saddle Tanks. Use this weight and moment information when calculating the aircraft weight and balance. King Air 200 Series and King Air 300 Fuel per Tank Gallons Total Fuel Gallons Total Weight * Pounds Moment * Inch-lbs/100 5 10 67 148 10 20 134 293 20 40 268 577 30 60 402 859 40 80 536 1141 50 100 670 1422 60 120 804 1699 Cargo per Tank Pounds Moment Inch-lbs/100 25 60 50 120 75 180 100 240 * Based on Jet-A turbine fuel at 6.7 lbs/gal. REFERENCE ONLY SECTION 6 CENTEX AEROSPACE 045-1 WEIGHT & BALANCE AIRPLANE FLIGHT MANUAL SUPPLEMENT JANUARY 2016 6-6 ST120 SADDLE TANKS WEIGHT AND MOMENT TABLE King Air B300 (350) Fuel per Tank Gallons Total Fuel Gallons Total Weight * Pounds Moment * Inch-lbs/100 5 10 67 158 10 20 134 312 20 40 268 616 30 60 402 917 40 80 536 1218 50 100 670 1518 60 120 804 1815 Cargo per Tank Pounds Moment Inch-lbs/100 25 64 50 127 75 191 100 254 * Based on Jet-A turbine fuel at 6.7 lbs/gal ST120 King Air 200 Series, King Air 300, and King Air B300 (350) USABLE FUEL PER TANK 60 Gallons UNUSABLE FUEL PER TANK 0.75 Gallons UN-DRAINABLE FUEL PER TANK 0.15 Gallons - ST72 Saddle Tanks Information Continued On Following Page - REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 6 AIRPLANE FLIGHT MANUAL SUPPLEMENT WEIGHT & BALANCE JANUARY 2016 6-7 ST72 SADDLE TANKS WEIGHT AND MOMENT TABLE The tables below provide the weight and moment of fuel and cargo carried in the ST72 Saddle Tanks. Use this weight and moment information when calculating the aircraft weight and balance. King Air 200 Series and King Air 300 Fuel per Tank Gallons Total Fuel Gallons Total Weight * Pounds Moment * Inch-lbs/100 5 10 67 138 10 20 134 274 20 40 268 545 30 60 402 816 36 72 482 978 Cargo per Tank Pounds Moment Inch-lbs/100 25 60 50 120 75 180 100 240 125 300 150 360 * Based on Jet-A turbine fuel at 6.7 lbs/gal. REFERENCE ONLY SECTION 6 CENTEX AEROSPACE 045-1 WEIGHT & BALANCE AIRPLANE FLIGHT MANUAL SUPPLEMENT JANUARY 2016 6-8 ST72 SADDLE TANKS WEIGHT AND MOMENT TABLE King Air B300 (350) Fuel per Tank Gallons Total Fuel Gallons Total Weight * Pounds Moment * Inch-lbs/100 5 10 67 147 10 20 134 292 20 40 268 582 30 60 402 872 36 72 482 1044 Cargo per Tank Pounds Moment Inch-lbs/100 25 64 50 127 75 191 100 254 125 317 150 381 * Based on Jet-A turbine fuel at 6.7 lbs/gal ST72 King Air 200 Series, King Air 300, and King Air B300 (350) USABLE FUEL PER TANK 36 Gallons UNUSABLE FUEL PER TANK 0.70 Gallons UN-DRAINABLE FUEL PER TANK 0.15 Gallons REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 7 AIRPLANE FLIGHT MANUAL SUPPLEMENT SYSTEMS DESCRIPTION AUGUST 2017 7-1 SECTION 7 SYSTEMS DESCRIPTION TABLE OF CONTENTS SUBJECT PAGE ST190 SADDLE TANKS (190 GALLON) ............................................................. 7-3 ST190 SADDLE TANKS FUEL SYSTEM ..................................................... 7-3 FUEL QUANTITY INDICATOR SYSTEM .................................................... 7-8 ST120 SADDLE TANKS (120 GALLON + STORAGE COMPARTMENT) ................ 7-9 ST120 SADDLE TANKS FUEL SYSTEM ....................................................... 7-9 FUEL QUANTITY INDICATION SYSTEM .................................................. 7-15 ST120 SADDLE TANK STORAGE COMPARTMENT .................................. 7-16 ST72 SADDLE TANKS (72 GALLON + STORAGE COMPARTMENT) .................. 7-17 ST72 SADDLE TANKS FUEL SYSTEM ....................................................... 7-17 FUEL QUANTITY INDICATION SYSTEM .................................................. 7-23 ST72 SADDLE TANK STORAGE COMPARTMENT .................................... 7-24 REFERENCE ONLY SECTION 7 CENTEX AEROSPACE 045-1 SYSTEM DESCRIPTION AIRPLANE FLIGHT MANUAL SUPPLEMENT MARCH 2015 7-2 THIS PAGE IS INTENTIONALLY BLANK REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 7 AIRPLANE FLIGHT MANUAL SUPPLEMENT SYSTEMS DESCRIPTION JANUARY 2016 7-3 ST190 SADDLE TANKS (190 GALLONS) SADDLE TANKS FUEL SYSTEM The CenTex Aerospace ST190 auxiliary fuel tanks or “Saddle Tanks” add 190 gallons (95 gallons each) of usable fuel capacity to the airplane fuel system. These tanks ride on top of the wing behind the nacelle. The contour of the tank’s lower surface matches that of the wing and fits like a saddle. Five attachment points on the wing hold each tank in place. An aerodynamic fairing streamlines the region between the rear of the engine nacelle and tank. The tanks are constructed solely from aluminum and are an assembly of a formed shell, segmented floor panels, and internal baffles. The tank shell and floor are 0.080 inch thick aircraft grade aluminum that makes the tanks very durable and easy to repair, and provides excellent protection against lightning strikes and corrosion. The internal baffles, which are constructed from 0.050 inch thick aircraft grade aluminum, control fuel sloshing and provide stiffness. The pieces are joined by a combination of riveted and welded seams. A special sealant (PRC PR1422) is applied internally to seal the seams. Removable panels in the shell and floor provide access to the inside in case a repair is needed. Each tank weighs approximately 90 pounds. A flush mounted filler cap, which is lightning safe, is located on top of the tank. When securing the cap, it should be properly aligned with the adjacent index mark to ensure proper sealing. As with all fuel tank caps, it is a matter of safety to ensure the cap is closed properly and sealed. Figure 7-1 shows the location of the Saddle Tank filler cap. FIGURE 7-1 SADDLE TANK FILLER CAP REFERENCE ONLY SECTION 7 CENTEX AEROSPACE 045-1 SYSTEM DESCRIPTION AIRPLANE FLIGHT MANUAL SUPPLEMENT MAY 2019 7-4 For ST190 Saddle Tanks, a sump drain with a push-to-open valve is located at the inboard rear corner of each tank. Opening the drain valve allows fuel from the lowest point in the tank to escape, which serves as a means to remove water or other contaminates. Figure 7-2 shows the location of the tank sump drain valve. FIGURE 7-2 TANK SUMP DRAIN Fuel in the ST190 Saddle Tank enters the airplane fuel system through an interconnected line between the tank and the auxiliary tank. The line is constructed of 5/8 inch diameter aluminum tubing. The Series 1 line traverses through the rear of the wheel well fairing under the rear spar and into the wheel well. A drain is provided at the lowest point (under the rear spar) so any contaminates that may have collected in the line can be removed. Figure 7-3 shows the location of the drain valve. FIGURE 7-3 FUEL LINE DRAIN REFERENCE ONLY CENTEX AEROSPACE 045-1 SECTION 7 AIRPLANE FLIGHT MANUAL SUPPLEMENT SYSTEMS DESCRIPTION MAY 2019 7-5 An update called the Series 2 line traverses a short distance along the rear wing spar web and then turns forward passing through the web and into the auxiliary tank bay. It feeds fuel into the auxiliary tank bladder through a nipple fitting and is secured by clamps inside the bladder. There is no low point in the line, therefore, no fuel drain is provided. Figure 7-4 shows a sump drain valve located between the inverter cooling louvers on the underside of the wing. This drain ensures the vent line outboard of the Saddle Tank is dry. A small amount of fuel (less than one ounce) may collect at this location. If larger amounts of fuel are routinely drained at this location, the suction relief and check valves in the fuel tank vent system should be checked for proper operation. FIGURE 7-4 VENT LINE DRAIN REFERENCE ONLY SECTION 7 CENTEX AEROSPACE 045-1 SYSTEM DESCRIPTION AIRPLANE FLIGHT MANUAL SUPPLEMENT AUGUST 2017 7-6 Figure 7-5 is a schematic of the fuel system with the Saddle Tank system depicted in red. Due to the Saddle Tank being on top of the wing, fuel in the Saddle Tank flows downward into the auxiliary tank assisted by gravity. Fuel inside the auxiliary tank is handled by the existing fuel system, which pumps it into the nacelle tank. Do not open the auxiliary tank cap if there is fuel in the Saddle Tank. Opening the cap and the anti-siphon valve (flapper) can result in fuel flowing out of the auxiliary tank if the Saddle Tank contains fuel. CAUTION REFERENCE ONLY