Thermoplastic Repairs - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFAIN SERVICE MANUAL
n.
Using dry 80 grit sandpaper on a power sander or sanding block, smooth patch and blend with
surrounding surface. Should air pockets appear while sanding, puncture and fill with catalyzed resin. A
hypodermic needle may be used to fill cavities. Let cure and resand.
o.
Mix catalyzed resin and work into patch with fingers. Smooth carefully and work into any
crevices.
p.
Cover with cellophane and squeegee smooth. Allow to cure completely before removing
cellophane. Let cure and resand.
q.
Brush or spray a coat of catalyzed resin to seal patch. Sand patch, finish by priming, again
sanding and applying color coat.
NOTE
Brush and hands may be cleaned in solvents such as acetone or
methylethylketone. If solvents are not available, a strong solution
of detergent and water may be used.
4-102. THERMOPLASTIC REPAIRS. The following procedure will assist in making field repairs to items
made of thermoplastic which are used throughout the airplane. A list of material needed to perform these
repairs is given along with suggested suppliers of the material. Common safety precautions should be observed
when handling some of the materials and tools used while making these repairs.
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Reissued: 9/23/80
STRUCTURES
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