TM 55-1520-240-23-4
5-68
REPAIR BLADE FAIRING SINGLE SKIN FULL DEPTH
(Continued)
5-68
j.
Start vacuum pump. Check for leaks.
Reposition polyvinyl sheet (E284) (35) or add
tape (E396) (31) 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 150º - 160ºF (66º - 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 (27), fabric (28), rubber
(29), fiberglass (30), tape (31), tube (32), and
sheet (35).
o.
If squeezeout fairing is not satisfactory, patch.
Use adhesive (E40, E41, or E43). Follow
step 25, 26 or 27 to mix adhesive.
INSPECT
p.
Go to step 35.
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