TM 55-1520-240-23-4
5-72
TRAILING EDGE REPAIR — MAJOR DAMAGE
(Continued)
5-72
Do not cut bevel in upper surface of
trailing edge. Strength of repair will
be reduced.
7.
Bevel trailing edge (1) as follows:
a.
Apply guide strips (6) of masking tape (E388)
to blade underside (7) 1/2 inch outside ends
of cutout (8).
b.
Bevel edge 1/2 inch toward tape (E388).
Use file.
c.
Remove guide strips (6).
8.
Prepare insert (9) and doublers (10) as follows:
a.
Cut insert (9) from trailing edge material
(E425.1). Make insert long enough to cover
bevels (11).
b.
Tape guide strips (12) on insert (9) 1/2 inch
from ends. Use masking tape (E388). Bevel
insert to guide strips. Use file.
c.
Remove guide strips (12).
d.
Cut two doublers of fiberglass laminate (E168
or E168.1) (10) 1/2 inch wider chordwise,
and 2 inches longer spanwise than insert (9).
e.
Check fit of insert (9). Check that doublers
(10) overlap insert by 1/2 inch chordwise and
2 inches spanwise.
f.
If fiberglass laminate (E168.1) is used,
remove peel ply covering from surfaces of
doublers (10).
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