TM 55-1520-240-23-4
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REPAIR BLADE FAIRING — DOUBLE SKIN
(Continued)
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19.
Prepare two skin patches (20) as follows:
a.
Position fiberglass laminate (E168 or E168.1)
(21) over cutout (15) with fibers at 45º to
chord.
b.
Draw outline of cutout (15) on fiberglass
laminate (E168) (21). Remove laminate.
Draw outline (22) 1 inch larger than cutout
outline on fiberglass laminate. Use pencil
compass and straightedge.
c.
Cut skin patches (20) with scissors. Smooth
rough edges with abrasive paper (E7).
d.
If fiberglass laminate (E168.1) is used,
remove peel ply from surfaces of patches
(20). Clean with acetone (E20). Wipe dry
with clean cloth (E120).
e.
Sand patches (20) lightly. Use abrasive
paper (E9).
NOTE
Patch will not adhere if surface glaze
is not removed.
f.
Check that patches (20) are 1 inch larger
than cutout (15) on all sides. Check that
blade surface finish is removed 1/2 inch
around patches.
g.
Trace patch outline (23) onto blade skin (12).
NOTE
These outlines will be used when
applying adhesive and for positioning
patches for bonding.
h.
Tape patch (20) on bottom of fairing (2). Use
masking tape (E388) (24).
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