TM 55-1520-240-23-4
5-67.1
REPAIR BLADE SPAR ROOT END MAJOR DAMAGE
(Continued)
5-67.1
Do not exceed 160ºF (71ºC) at blade
surface. Damage to fiberglass can
occur.
l.
Cure adhesive at 140º - 160ºF (60º - 71ºC)
for 2 hours. Use heat lamp. Monitor
temperature. Use temperature indicating
strips (E413).
NOTE
Serviceable cure can be achieved
without heat at 70º - 80ºF (21º -
27ºC) in 24 hours. Vacuum may be
removed after 12 hours.
m.
Turn off vacuum pump.
n.
Remove peel ply (5), fabric (6), rubber (7),
fiberglass (8), tape (9), tube (10), and sheet
(12).
o.
If squeezeout fairing is not satisfactory, fair
patch. Use adhesive (E40, E41, E43 or
E47.1). Follow step 8 or 9 to mix adhesive.
Harmful adhesive particles can be
inhaled if respirator is not worn during
sanding.
13.
Sand the repair as necessary to blend with the
surrounding area. Use abrasive paper (E9).
Wear a respirator.
INSPECT
FOLLOW-ON MAINTENANCE:
Refinish repaired area (Task 5-82).
END OF TASK
5-337