PIPER CHEROKEE SERVICE MANUAL
01/31/08
IX - FUEL SYSTEM
3C17
9-3. TROUBLESHOOTING.
Troubles peculiar to the PA-28 fuel system are listed in Table IX-III along with their probable causes and
suggested remedies. When troubleshooting, check from the power supply to the items affected. If no
trouble is found by this method, the trouble probably exists inside individual pieces of equipment; they
may then be removed from the airplane and an identical unit or units, tested and known to be good,
installed in their place.
9-4. MAIN FUEL TANKS. (PA-28-140, -150, -160, -180, -235 and PA-28R.)
9-5. REMOVAL OF MAIN FUEL TANKS.
a.
Drain the fuel from the fuel tank. (Refer to Draining Fuel System, Section II.)
b.
Remove the screws from around the perimeter of the tank assembly.
c.
Disconnect fuel line attached to tank.
d.
Pull the tank away from the wing assembly far enough to gain access for removal of the sender
wire.
e.
The tank is now free to be removed.
9-6. INSPECTION AND REPAIR.
Visually inspect fuel tanks and adjacent areas for signs of leaks. Tell tale stains are frequently the first
indication. Fuel tanks found to be seeping or leaking fuel must be removed and repaired, as authorized
herein, or replaced.
WARNING: SLOSHING OF FUEL TANKS PROHIBITED.
a.
Remove tank(s) as described above.
b.
Fuel tanks which have previously been sloshed must be replaced if new leaks are detected.
c.
Leaks in fuel tanks which have not been sloshed can be sealed with Products Research Corp.
PR-1422A2 sealant.
1.
Allow sealant to cure 72 hours.
2.
Leak check repair by filling the fuel tanks with 1.5 psi clean dry air and:
(a) applying a water and soap solution; or,
(b) submerging seams in clean water a minimum of one (1) to no more than six (6) inches.
NOTE: Replace the tank if it cannot be successfully repaired by the method above.
9-6a. SLOSHED FUEL TANK 100 HOUR INSPECTION.
WARNING: SLOSHING OF FUEL TANKS PROHIBITED.
Replacement of fuel tanks which have previously been sloshed is recommended. If the fuel tank must
remain in service, each 100 hours inspect as follows:
a.
The entire interior of the tank should be inspected with the tanks drained. Use a mirror and
inspection light through the filler neck and inspect for peeling of the sloshing compound. Small
scrapes in the film adjacent to the filler neck may be disregarded provided there is no indication of
peeling.
b.
If peeling has occurred and separated material is found, the tank must be removed and replaced.
Summary of Contents for Cherokee 140 PA-28-140
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Page 19: ...PIPER CHEROKEE SERVICE MANUAL 1A19 SECTION I AIRWORTHINESS LIMITATIONS...
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