Piper PA-32R-301T SARATOGA S, Maintenance Manual

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AIRFOILS (Cont.)
I-Pneumatic Boots (cont.)
(2) Boot Repair (cont.)
2 Buff area around damage with buffing stick, Part No. 74-451-75, so that surface is
thoroughly roughened.
3 Apply patch to deicer with stretch in widthwise direction of inflatable tubes, sticking
edge of patch in place, working remainder down with slight pulling action so injury is
closed. Do not trap air between patch and deicer surface.
(c) Loose Surface Ply in Dead Area (Non-Inflatable Area)
1 Peel and trim loose surface ply to where adhesion of surface ply to deicer is good.
2 Scrub (roughen) area in which surface ply is removed with steel wool. Scrubbing motion
must be parallel to cut edge of surface ply to prevent loosening it. Scrub with steel wool
and Toluol directly over all edges, but parallel to edges or surface ply to taper them down
to tan rubber ply.
3 Cut a piece of surface ply material, Part No. 74-451-23, to cover damaged area and
extend at least one inch beyond in all directions.
4 Mask off damaged boot area 1-1/2 inch larger in length and width than size of surface
ply patch. Apply one coat of cement, Part No. 74-451-20, to damaged area and one coat
of patch. Allow cement to set until tacky. Roll surface ply to deicer with 2 inch rubber
roller, Part No. 74-451-74. Roll edges with stitcher-roller, Part No. 74-451-73. Apply just
enough tension on surface ply when rolling to prevent wrinkling and be careful to pre-
vent trapping air. If air blisters appear after surface ply is applied, remove them with a
hypodermic needle.
5 Clean excess cement from deicer with solvent.
(d) Loose Surface Ply in Tube Area . Loose surface ply in tube area is usually an indication of
deicer starting to flex fail. This type of failure is more easily detected in form of a blister
under surface ply when deicer is pressurized. If this type of damage (or void) is detected
while still a small blister (about 1/4 or 3/8 inch diameter) and patched immediately, service
life of deicer will be appreciably extended. Apply repair patch as outlined in Paragraph I, (2),
(a), 2.
(e) Damage to Fabric Back Ply of Deicer During Removal
If cement has pulled loose from wing skin and adhered to back surface of deicer, remove it
with steel wool and MEK. In those spots where coating has pulled off fabric, leaving bare
fabric exposed, apply at least two addi- tional coats of cement, 1300L. Allow each coat to
dry thoroughly.
(3) Vulcanized Repairs
Due to variety of boot damage possible, it is recommended that B. F. Goodrich Company be
contacted so they can determine extent of damage and whether it is repairable by vulcanized
method or not. Overall condition of deicer boot must be given careful consideration before
deciding on any repairs. Damages can vary from minor punctures which may be easily repaired,
to extensive ripping of tube or stretch areas which may make repairs exceedingly difficult or
impossible. Determination where this division between repairable and unrepairable damage exists
will depend upon careful judgment of the inspector. For this reason, Piper recommends contacting
B. F. Goodrich Company at Akron, Ohio.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
30-10-00
Page 30-13
Reissued: July 1, 1993
2H7