PIPER PA-31-310/325 Navajo
Piper PA-31 Navajo · Systems Description
Overview
This document is a service bulletin for the Piper PA-31-310 and PA-31-325 Navajo aircraft, detailing mandatory inspections and maintenance procedures. It specifically addresses Airworthiness Directives (ADs) that apply to serial numbers 31-2 through 31-8312019. The bulletin outlines the necessary inspections for exhaust couplings, tailpipes, and rudder torque tubes, emphasizing the importance of regular checks to ensure safety and compliance with regulatory standards. The document serves as a critical reference for maintenance personnel and pilots to maintain the airworthiness of these aircraft models.
- Mandatory inspection of exhaust couplings every 100 hours of operation.
- Rudder torque tube inspections required every 12 months for corrosion.
- Specific part numbers for exhaust system components are provided for maintenance.
- Tailpipes must be inspected for internal pitting and wall thickness.
Document
Source
Originally published by www.acornwelding.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Systems Description
- Year
- 2010
- Pages
- 1
- File size
- 225 KB
- Publisher
- www.acornwelding.com
Common. Rarer than 3% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the Piper PA-31 Navajo.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
Free — save the PA-31 Navajo to your watchlist and track it in one place.
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In this document
Exhaust Coupling Inspection
This section outlines the requirements for inspecting exhaust couplings and tailpipes on the PA-31-310 and PA-31-325. It specifies that the V-band segments must be checked for cracks, and flanges should be inspected for any signs of distortion or damage. Inspections are mandated every 100 hours of operation.
Rudder Torque Tube Inspection
This section details the inspection of the rudder torque tube and associated ribs for corrosion. It is required that these components be inspected every 12 months, with necessary repairs or replacements to be made if any corrosion is found.
Parts List
A comprehensive parts list is provided, detailing various components such as risers, tubes, elbows, clamps, and gaskets, along with their respective part numbers. This list is essential for maintenance and repair operations.
Tailpipe Inspection
The document instructs on the inspection of two-piece tailpipes to ensure they can be disassembled and that their dimensions are within standard nominal limits. It also emphasizes checking for internal pitting and wall thickness, particularly at the outside radius.
Safety notes
- Inspect V-band segments for cracks to prevent exhaust leaks.
- Corrosion in the rudder torque tube can affect aircraft control.
Full document text
PIPER PA-31-310/325 Navajo AD 82-16-05 Applies to S/N's 31-2 thru 31-8312019 equipped with P/N's 455-301, 555-376, 555-511 or 555-366 couplings. Remove exhaust couplings and tailpipe and inspect V- band segments for cracks. Inspect flanges for cracks or distortion. Inspection required every 100 hrs of operation. AD 2003-24-07 Applies to S/N's 31-2 thru 31-8312019. Inspect rudder torque tube and associated ribs for corrosion. Repair or replace rib/rudder torque assembly. Inspection required every 12 months. Item Part Number Description LW-10159 RISER RIGHT HAND FRONT LW-10160 RISER RIGHT HAND CENTER LW-10161 RISER RIGHT HAND REAR LW-15850 TUBE INTERMEDIATE RIGHT FRONT LW-16792 ELBOW INTERMEDIATE RIGHT CENTER LW-16793 ELBOW INTERMEDIATE RIGHT REAR LW-10164 RISER LEFT HAND FRONT LW-10163 RISER LEFT HAND CENTER LW-10162 RISER LEFT HAND REAR LW-15849 TUBE INTERMEDIATE LEFT FRONT LW-16789 ELBOW INTERMEDIATE LEFT CENTER LW-16790 ELBOW INTERMEDIATE LEFT REAR LW-12127 TRANSITION WITH STUDS 40310-008 UPPER TAILPIPE 40310-009 LOWER TAILPIPE (488-043) 6300 HEATER PIPE RIGHT HAND FRONT 6100 HEATER PIPE LEFT HAND FRONT LW-12093-5 CLAMP ELBOW TO TRANSITION 557-584 CLAMP TAILPIPE (NH1005834-10) 555-511 CLAMP TAILPIPE (MVT69861-377) LW-12125-3 CLAMP TURBO BYPASS TOP LW-12093-6 CLAMP TURBO BYPASS BOTTOM 78083 GASKET ELBOW TO TRANSITION LW-15619 GASKET MANIFOLD (STANDARD) LW-15486 GASKET MANIFOLD (NO BLOW) 75845 GASKET WASTEGATE 41567-000 INDUCTION AIR TUBE PA-31-310 54916-002 INDUCTION AIR TUBE PA-31-325 LW-18248 ROD TURBO SUPPORT RIGHT HAND LW-16965 ROD TURBO SUPPORT LEFT HAND 76770 BRACKET SUPPORT ROD PA-31-310 LW-10119 BRACKET TOP SUPPORT LW-15952 TURBO SUPPORT MOUNT PA-31-310 LW-18459 BRACKET SUPPORT ROD PA-31-325 LW-12339 TURBO SUPPORT MOUNT PA-31-325 24096-225N GASKET BY PASS 40007-007 ENGINE MOUNT J-9612-8 SHOCK MOUNT J-7763-1 SHOCK MOUNT VARIOUS SEAT BASE (488-042) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 19 20 21 22 - - - 23 24 25 26 27 28 29 30 31 32 - - - - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 19 20 21 22 - - - 23 24 25 26 27 28 29 30 31 32 - - - - Inspect two piece tailpipes to ensure that they can be disassembled and the ends are standard nominal dimensions. This will determine if the new ordered stack will fit into the old stack. Inspect joints for freedom of movement and distortion. Inspect tail pipes for internal pitting and wall thickness especially at the outside radius, which is the thin section, and at support bracket. Inspect transition header for cracks Slip fit stacks should be ordered as a complete assembly to ensure good joint integrity with smooth slip fits. 15 17 18 19 20 13 14 12 11 16 10 1 2 4 5 3 6 7 8 9 25 27 30 29 24 28 25 22 23 26 28 31 32 26 21 Exhaust Systems Engine Mounts Carb Air Boxes Shrouds Seats Piston Turbine Radial Vintage And More... L E L N E C C E X E (toll free) 1-888-388-8803 1-780-447-5955 Fax: 1-780-447-5980 sales@acornwelding.com parts@acornwelding.com www.acornwelding.com (toll free) 1-888-388-8803 1-780-447-5955 Fax: 1-780-447-5980 sales@acornwelding.com parts@acornwelding.com www.acornwelding.com ©2010 Acorn Welding Ltd.