TM 55-1520-240-23-4
5-69.1
REPAIR BLADE FAIRING — FOAM FILLER
(Continued)
5-69.1
j.
Start vacuum pump. Check for leaks.
Reposition polyvinyl sheet (E284) (27) or add
tape (E396) (23) as needed.
k.
Maintain 20 inches Hg vacuum through
adhesive cure.
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 4 hours. Vacuum may be removed
after 12 hours.
m.
Turn off vacuum pump.
n.
Remove peel ply (19), fabric (20), rubber
(21), fiberglass (22), tape (23), tube (24), and
sheet (27).
o.
If squeeze out fairing is not satisfactory, fair
patch (15). Use adhesive (E40, E41, E43, or
E47.1). Follow step 18, 19, 20, or 21 to mix
adhesive.
INSPECT
27.
Find weight of repair in table. Record weight for
blade tracking weight adjustment.
NOTE
All blade, weight adjustment, painting,
or balancing will be recorded on
rotor blade DA Form 2408-16, each
blade requires a separate form. If
the rotor blade does not have a DA
Form 2408-16, one must be prepared
and all actions recorded, as example;
location of repair, size of repair,
weight of repair, and required weight
adjustments for track and balance.
FOLLOW-ON MAINTENANCE:
Refinish repaired area (Task 5-82).
Adjust blade tracking weights (Task 5-82.1).
END OF TASK
5-386
