INBOARD RIB CLOSURE AND TIP SEAL MINOR REPAIR
If more than half of material is missing
or damaged, go to Task 5-77.
Procedure is similar for inboard rib
closure and tip seal minor repair on
any rotary-wing blade. Differences
are noted in text.
Prepare rib closure (1) or tip seal (2) for repairs
Remove loose material from damaged area.
Use pocket knife.
On tip seal (2) only, remove fiberglass from
around damaged area. Use pocket knife.
On rib closure (1) only, trim rubber to feather
edge. Use pocket knife.
Clean damaged area of rib closure (1) or tip seal
(2). Use cloth (E120) damp with acetone (E20).
Wear gloves (E186).
Fill damaged area. Use sealant (E336). Fair
sealant to shape of surfaces around repair area.
Use rubber spatula.
On tip seal (2) only, cover repair. Use glass cloth
(E130) welled with sealant (E336).
Cover repaired area. Use Teflon tape (E346).
Pull tape tightly over repair. Secure tape firmly to
blade (3). Be sure tape overlaps repair no less
than 1 inch.
Cure sealant 6 hours at 70º - 80ºF (21º - 27ºC).
Remove tape. Check that repair is secure, and
there are no voids.