TM 55-1520-240-23-4
5-69.1
REPAIR BLADE FAIRING — FOAM FILLER
(Continued)
5-69.1
d.
Rest edge of router base (6) on router guide
line (5). Keep bit (7) above blade skin.
e.
Slowly lower bit (7) onto blade skin (8). Keep
edge of router base (6) on guide line. Move
router (4) counterclockwise.
f.
Complete cut and move router (4) to center of
damage area (1). Turn router off and remove
it.
6.
If hole saw is used to remove damaged skin (1),
proceed as follows:
a.
Use hole saw with center drill that does not
extend more than 1/4 inch beyond saw.
b.
Position hole saw on guide line (5). Cut only
deep enough to go through skin (8). Hold
saw lightly against skin and turn slowly. Use
wrench.
7.
If knife is used to remove damaged skin (1),
make a series of punctures along guide line (2)
until damaged skin is separated.
8.
Peel off cut-out section of skin (8). Use pliers and
chisel. Work from center outward. Prying against
skin around repair will cause additional damage.
Do not cut or score opposite skin
when removing damaged core.
9.
Cut through core (9) to opposite skin (10). Use
pen knife with blunt point. Cut only deep enough
to separate damaged core.
10.
Remove damaged core (9). Use pliers and
chisel. Avoid damage to skin.
11.
Clean cutout (10). Use vacuum cleaner.
12.
Apply Teflon tape (E399) (11) around cutout (10).
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