THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 11
Jun 1/03
3C21
28-10-00
(2) Chemical Test:
NO
TE: The chemical test is the more sensitive and preferred test.
(a) Attach a test plate to all fitting openings except one.
(b) Make up a Phenolphthalein solution as follows:
1 Add 40 grams Phenolphthalein crystals in 1/2 gallon of Ethyl Alcohol and mix, then;
2 Add 1/2 gallon of water.
(c) Pour ammonia on an absorbent cloth in the ratio of 3 ml per cubic foot of cell capacity.
Place ammonia saturated cloth inside the cell.
(d) Install remaining test plate to opening used to insert ammonia saturated cloth.
(e) Inflate cell with air to a pressure of 1/4 psi maximum. Cap and maintain pressure for
fifteen minutes.
(f) Soak a large white cloth in phenolphthalein solution. Wring it out thoroughly. Spread cloth
smoothly on outer surface of cell. Press cloth down to insure detection of minute leaks.
(g) Check cloth for red spots, which indicate a leak. Mark any leaks found and move cloth to a
new location. Repeat procedure until entire exterior surface of cell has been covered. Red
spots appearing on cloth may be removed by resoaking cloth in phenolphthalein solution.
(h) Phenolphthalein solution and test cloth are satisfactory only as long as they remain clean.
Any phenolphthalein solution that is not in immediate use should be stored in a closed
rust proof container to prevent evaporation and deterioration.
(i) After test, remove all plates and test equipment. Allow cell to air out.
(3) In conducting either test outlined above, the cell need not be confined by a cage or jig,
providing the 1/4 psi pressure is not exceeded.
4. Loc
king Fuel Cap (Refer to Figure 3.)
One key operates the locking fuel cap, the ignition and door locks.
A. Disassembly
(1) Remove the two screws from top of fuel cap.
(2) Remove screw and lock washer that secures pawl to bottom of key lock. Remove pawl.
(3) Remove nut that secures key lock to cover.
(4) Slide lock, gaskets, and spring over back of key lock.
(5) Remove key lock by pushing key lock through cover. Ensure that the O–ring is not lost.
B. Assembly
(1) Insert key lock through cover. Make sure that O–ring gasket is installed under head of key lock.
(2) Slide spring, gaskets, and lock over back of key lock.
(3) Install nut that secures key lock to cover.
(4) Apply LOCTITE #211 or #680 to screw threads primed with LOCQUIC “N” or “T”. Attach pawl
to back of lock assembly with screw and lock washer.
(5) Apply a thin coating of PR-1422 sealant to shank and thread of the screws removed from top
of cap. Install screws and lock washers on top of fuel cap.
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