Piper COMANCHE PA-24-180 Service Manual page 499

PIPER COMANCHE
SERVICE MANUAL
FIGURE 87. BAYONET FASTENERS FIGURE 8. BUTTON FASTENERS
g. Insert the arm between the fuel cell and top of the wing, work outward from the opening
releasing the cell support bayonet clips. (Refer to figure 8-7.) The clips fit into compartment
fasteners and can be released by exerting pressue inward on all PA-24 series aircraft except the
outboard cells of the PA-24-400. After releasing all upper clips, release the lower clips.
h. On the outboad cells of the PA-24-400 both the bayonet clips and button pin type fasteners
are used. (Refer to figure 8-8.) To disconnect this cell from its fastener plates, release all the
top fasteners which are the bayonet clips. After the top has been released, reach under the cell
and work the pin type fasteners from their bracket plates. The front-outboard pin is worked out*
ward while the aft-outboard pin is worked rearward. The inboard fasteners are all worked inward
toward the fuselage. The center fasteners are the bayonet type.
i. Fold the cell neatly within the wing and remove it gently through the oval opening at the
top of the wing.
8-6.
Handling And Storage. When synthetic rubber fuel cells are placed in service, the gasoline
has a tendency to extract the plasticizer from the inner liner of the fuel cell. This extraction of
plasticizer is not detrimental as long as gasoline remains in the fuel cell, inasmuch as the gaso-
line will act as a suitable plasticizer. When the gasoline is drained from the fuel cell, the plas-
ticizing effect of the gasoline is lost and the inner liner of the fuel cell begins to dry our and
subsequent craclkng will occur. This cracking may penetrate through the walls of the cell after
the cell has been refueled. To prevent this failure from affecting serviceable fuel cells which
previously contained gasoline and are now to be stored for more than 10 days in the airplane or
in storage, a thin coat of engine oil should be applied to the inner liner of the cells. If it be-
comes necessary to return cells to the contractor, they should be repacked as nearly similar to
the original factory pack as possible.
a. Do notdrag or handle the fuel cells any more than necessary by their molded nipple fittings,
cell openings or attachment fittings.
b. Store cells at room :emperature with no more than normal humidity.
c. Do not allow the cells to remain any longer than possible under strong light.
FUEL SYSTEM
ISSUED: 3/18/72
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