Piper Cherokee LANCE, Service Manual

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PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
07/15/06 IV - STRUCTURES
1F15
4-20. FIBERGLASS REPAIRS. The repair procedure in this manual will describe the methods for the repair
of fiberglass reinforced structures. Paragraph 4-21 describes Touch-up and Surface Repairs such as
blisters, open seams, delaminations, cavities, small holes and minor damages that have not harmed the
fiberglass cloth material. Paragraph 4-22 describes Fracture and Patch Repairs such as puncture, breaks,
and holes that have penetrated through the structure and damaged the fiberglass cloth. A repair kit, part
number 756-729, that will furnish the necessary material for such repairs is available through Piper
Dealers.
NOTE: Very carefully follow resin and catalyst mixing instructions furnished with repair kit.
4-21. FIBERGLASS TOUCH-UP AND SURFACE REPAIRS.
a. Remove wax, oil and dirt from around the damaged area with acetone, Methylethylketone or
equivalent and remove paint to gel coat.
b. The damaged area may be scraped with a fine blade knife or a power drill with a burr attachment to
roughen the bottom and sides of the damaged area. Feather the edge surrounding the scratch or
cavity. Do not undercut the edge. (If the scratch or cavity is shallow and penetrates only the surface
coat, continue to Step h.)
c. Pour a small amount of resin into a jar lid or on a piece of cardboard, just enough to fill the area
being worked on. Mix an equal amount of milled fiberglass with the resin, using a putty knife or
stick. Add catalyst, according to kit instruction, to the resin and mix thoroughly. A hypodermic
needle may be used to inject gel into small cavities not requiring fiberglass millings mixed with the
gel.
Figure 4-10. Repair of Impacted Damage