THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 10
Jun 1/03
3C20
28-10-00
(5) Looseness Against Metal:
1 Prepare metal as per metal fitting - sealing surfaces.
2 Apply 80C27 mixed cement and cure.
G. Molded Nipple Fittings Installation
The lightweight molded nipple fitting was developed for ease of installation. To receive the best
service from this type fitting, it is necessary to exercise certain precautions during installation.
(1) Unless otherwise specified, insert tubing into fitting until end is flush with inside edge of nipple.
(2) Hose clamp must clear end of fitting by 1/4 inch where possible.
(3) Locate hose clamp on fabric reinforced area of nipple.
(4) Do not use sealing paste or gasket compound.
(5) Use lightweight motor oil to facilitate insertion of tubing into nipple.
H. Accessory Replacement
(1) Obtain a cured repair accessory from cell manufacturer.
(2) Mark location of old accessory. Preserve markings for guide lines to locate new part.
(3) Remove old accessory by gradually loosening an edge with a blunt probe-like instrument.
(4) When a loose edge is created, grasp the accessory by loose edge with pliers and gently peel it
off cell wall. Be careful not to pull cell lap open while peeling accessory off. Pull from blind side
of a cell lap toward the exposed edge.
NOTE: Removal of the old accessory will probably leave an uneven cavity and surface.
(5) Buff cell surface under accessory with emery cloth to smooth roughness and prepare for
cement.
(6) Prepare replacement accessory by buffing and washing contact surface. Also wash the cell
surface (see Heat Cure Repair Patch Method, Preparation, above.)
(7) Apply mixed 80C27 repair cement to both surfaces being sure to level cavity left by removal of
old accessory.
(8) Roll new accessory into place as with a repair patch. Place suitable padded plates in position
to insure adequate pressure when clamped. Use a cellophane separator to prevent the cement
from sticking in the wrong place (as described in Heat Cure Repair Patch Method, above.)
(9) Cure by either heat cure or air cure method.
I. Testing
Use either of the following procedures to detect leaks in bladder cells:
(1) Soap Suds Test:
(a) Attach test plates to all fittings.
(b) Inflate the cell with air to a pressure of 1/4 psi maximum.
(c) Apply a soap and water solution to all repaired areas suspected of leakage. Bubbles will
appear at any point where leakage occurs.
(d) After testing, remove all plates and wipe soap residue from the exterior of the cell.
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