TM 55-1520-240-23-4
5-70
REPAIR BLADE FAIRING — DOUBLE SKIN
(Continued)
5-70
b.
Install router bit (11). Set depth to about
0.020 inch.
Wear goggles, respirator, and
protective clothing when using router.
Fiberglass particles will irritate eyes,
lungs, and skin.
c.
Start router (9). Keep router under complete
control. Grasp handles using both hands.
d.
Rest edge of router base (10) on router guide
line (8). Keep bit (11) above blade skin (12).
e.
Slowly lower bit (11) onto blade skin (12).
Keep edge of router base (10) on guide line.
Move router (9) counterclockwise.
f.
Complete cut and move router (9) to center
of damaged area (1). Turn router off and
remove it.
6.
If hole saw is used to remove damaged skin,
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 (7). Cut only
deep enough to go through skin (12). Hold
saw lightly against skin and turn slowly. Use
wrench.
7.
If knife is used to remove damaged skin (12),
make a series of punches through skin along
guide line (7) until damaged skin is separated.
8.
Peel off cut-out section of skin (12). Peel from
center of damage area (1). Do not pry against
undamaged fairing skin. Use pliers and chisel.
9.
Repeat step 5, 6, or 7 for skin (12) on opposite
side of blade.
10.
Cut through core (13). Use pocket knife.
11.
Remove core (13).
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