TM 55-1520-240-23-4
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REPAIR BLADE FAIRING — SINGLE SKIN FULL DEPTH
(Continued)
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d.
Check that patch (19) is 1 inch larger than
core (11) on all sides. Check that blade
surface finish is removed 1/2 inch around
patch.
e.
Trace patch outline (22) onto blade skin (9).
f.
If fiberglass laminate (E168.1) is used,
remove peel ply from surfaces of patch.
Clean patch with acetone (E20) and wipe dry.
g.
Sand both sides of patch (22) to remove
surface glaze. Use abrasive paper (E9).
NOTE
Patch will not adhere if surface glaze
is not removed.
23.
Clean core (11) and cutout (13). Use vacuum
cleaner.
24.
Wear gloves (E186). Clean core (11) and skin
(9) where finish was removed. Use cloth (E120)
damp with acetone (E20). Wipe with clean cloth.
Do not remove gloves.
INSPECT
APPLY ADHESIVE
NOTE
Prepackaged adhesive (E40) is
preferred. Use adhesive (E41 or E43)
only if prepackaged kit is not available.
25.
Mix tube of adhesive (E40). Follow instructions
on kit.
26.
If adhesive (E40) is not available, prepare
adhesive (E41) as follows:
a.
Weigh 100 parts of resin and 23 parts of
hardener. Use trip balance.
b.
Mix parts in polyethylene cup (E157) until
color is uniform. Use wood spatula (E424).
27.
If adhesive (E43) is used, prepare as follows:
a.
Weigh 7 parts of gray hardener and 5 parts
of white base. Use trip balance.
b.
Mix parts in polyethylene cup (E157) until
color is uniform. Use wood spatula (E424).
NOTE
Working life of adhesive is 30
minutes.
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