Piper Navajo PA-31 Service Manual page 106

PIPER NAVAJO SERVICE MANUAL
NOTES: (cont)
21 Refer to latest revision of Lycoming Service Bulletin No. 347.
22. Replace any v-band coupling attaching the exhaust tailpipe to the turbocharger at 1000 hour intervals or sooner if
inspection indicates wear, buckling, etc. (Refer to latest revision of Piper Service Bulletin 644.)
23. Refer to latest revision of Piper Service Bulletin 644 for inspection and replacement of turbocharger exhaust cou-
pling.
24. Refer to Lycoming Service Instruction 1384
25. Remove emergency exit window completely from fuselage to ensure correct operation (refer to section IV).
26. Examine cables for broken strands by wiping a cloth along the length of the cable. Visually inspect the cable thor-
oughly for damage not detected by the cloth. Replace damaged cables. Refer Advisory Circular 43.13-1A, para-
graph 198.
27. Inspect emergency hydraulic hand pump handle assembly for signs of corrosion at attachment point. Replace han-
dle assembly if any evidence of corrosion is present.
26. Examine cables for broken strands by wiping a cloth along the length of the cable. Visually inspect the cable thor-
oughly for damage not detected by the cloth. Replace damaged cables. Refer Advisory Circular 43.13-1A, para-
graph 198.
27. Inspect emergency hydraulic hand pump handle assembly for signs of corrosion at attachment point. Replace han-
dle assembly if any evidence of corrosion is present.
28. Refer to latest revision of Piper Service Letter 789 for inspection of elevator bellcrank and control rod.
29. Refer to latest revision of Piper Service Bulletin 687 for stabilizer/ elevator outboard hinge inspection.
30. Pressure check all fluid hoses in fuselage and wing areas after 10 years time-in-service. Visually check for leaks.
Hoses that pass inspection may remain in service and checked thereafter each five years time-in-service.
31. These inspections apply to Dukes Systems only S/N 31-5 to 31-7812129 inclusive. (Refer to latest revision of Piper
Service Bulletin 739.)
32. If severe buckling, cracks or loose rivets are noted, remove fire shield for inspection and repair.
33. Inspect fuel cells every 2 years. (Refer to section IX.)
34. Refer to latest revision of Piper Service Bulletin 591 for inspection of Goodyear BTC-39 fuel cells and to comply
with FAA Airworthiness Directive 78-05-06.
35. Replace fuel tank vent line flexible connections as required, or every five years, whichever comes first.
36. Only use brass screws to install the access plate that covers the flux detector on the top outboard section of the left
wing on airplanes equipped with remote compass systems. Steel screws cause erratic compass readings.
37. Refer to latest revision of Piper Service Bulletin 700 for inspection of nose wheel.
38. Comply with latest revision of Piper Service Bulletin 629.
39. Initial inspection required after first 1,000 hours time-in-service; repetitive inspection required each 100 hours time-
in-service. Inspection also required whenever landing gear is operated at speeds above maximum landing gear operat-
ing speed (VLO). Refer to Piper Service Bulletin No. 845.
40. Replace landing gear selector cable at 4,000 hours time-in-service or 10 years, whichever comes first.
41. Refer to flight manual supplement for preflight and flight check, for intended function in all modes.
42. Refer to latest revision of Piper VSP 99 or latest revision of Aeroquip Service Bulletin No. 001R1.
43. Inspect all rod end bearings for freedom of ball movement. Use a 10X magnifying glass to check thread end of
bearing for cracks and damage. Replace bearing if ball is frozen or hard to move.
44. Inspect condition of cowl fastener locked indicator stripes. Touch-up or restore as necessary. Refer to Service
Manual, Section VIII.
45. Remove sludge from propeller and crankshaft whenever propeller is removed from engine.
46. After first 6000 hours time-in-service, inspect splice plate joining wing spar lower caps at airplane centerline .
Clean all dirt, grease and paint from aft edge and accessible top surface of splice plate one inch either side of center-
line bend in plate. Using a flashlight and mirror, conduct a close visual inspection of splice plate for cracks. If
accessible, inspect forward edge and top surface of splice plate in same manner. Thereafter, inspect each 100 hours
time-in-service.
47. Each 300 hours time-in-service, inspect condition and operation of oxygen pressure regulator, pressure gauge, high
and low pressure lines, cabin outlets, and external recharge valve.
48. At end of 500 hours heater operation, conduct 100 hour inspection in accordance with Janitrol Maintenance and
Overhaul Manual P/N 24E25-1 dated October 1981 and AD 82-07-03.
Revised: 2/18/94
Interim Revision: 12/02/94
INSPECTION
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