TM 55-1520-240-23-4
5-69.1
REPAIR BLADE FAIRING — FOAM FILLER
(Continued)
5-69.1
2.
Outline damage area (1). Make circle or oblong
outline (2). Damage removal area shall have no
corners.
Do not wash contaminants into
damage area if acetone (E20) is used
to soften finish. Contaminants can
prevent satisfactory repair.
3.
Remove finish 1-1/2 inches outside of outline (2)
around damage. Use sanding block and abrasive
paper (E6). Use acetone (E20), if needed to
soften finish. Complete finish removal. Use
abrasive paper (E7). Do not sand through wire
mesh.
4.
If wire mesh diverter (3) must be replaced,
expose wire mesh 1-1/2 inches outside of
damage area.
5.
If router is not available, go to step 6 or 7. If
router is used to remove damaged skin, proceed
as follows:
a.
Draw line (5) around outline (2). Space outer
line (5) so outer edge of router base (6) will
follow it while router bit (7) follows outline
(2). Use pencil compass and straightedge.
If damage area (1) will not support compass
point, cover area. Use template paper (E263)
and masking tape (E388). Remove paper
and tape.
b.
Install router bit (7). Set depth to 0.020 inch.
Wear goggles, respirator, and
protective clothing when using router.
Fiberglass particles will irritate eyes,
lungs, and skin.
c.
Start router (4). Keep router under control.
Use both hands.
5-380
