Fuel Cell Defect Repairs; Testing Fuel Cells - Piper PA-32R-301 SARATOGA SP Maintenance Manual

FUEL STORAGE (Cont.)
K. Accessory Replacement (cont.)
(5) Buff cell surface under accessory with emery cloth to smooth roughness and prepare for cement.
Removal of the old accessory will probably leave an uneven
cavity and surface.
(6) Prepare replacement accessory by buffing and washing contact surface. Also wash the cell surface
(see paragraphs J, (4), (a), 2 and 3.)
(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 [see paragraphs J, (4) (g) and (h)].
(9) Cure by either heat cure or air cure method.
L. Fuel Cell Defect Repairs
(1) Blisters:
(a) Remove loose material by trimming.
(b) Apply an outside and inside repair patch.
(2) Holes, Punctures, Cuts, Tears and Deep Abraded Areas:
(a) Trim away any ragged material
(b) Apply an outside and inside repair patch.
(3) Loose Seams:
(a) Buff loose edges and contact surfaces with emery cloth.
(b) Wash three times with Mehtylethylketone.
(c) Apply 80C27 mixed cement in two coats as with a repair patch.
(d) Clamp and cure. Cure by either heat cure or air cure method.
(e) Loose seams may be trimmed if a minimum lap remains.
(4) Loose Fitting Flange - Inside:
(a) Buff the edge of the flange and the contact surface under the flange.
(b) Apply 80C27 mixed repair cement, cellophane, padded plates and clamp.
(c) Follow procedure as outlined for repair patch.
(5) Looseness Against Metal:
(a) Prepare metal as per metal fitting - sealing surfaces.
(b) Apply 80C27 mixed cement and cure.
M. Testing Fuel Cells
Use either of the following procedures 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.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
– NOTE –
2E4
28-10-00
Page 28-15
Reissued: July 1, 1993