TM 55-1520-240-23-4
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REMOVE LIGHTNING PROTECTION JUMPER WIRE INSERT
(Continued)
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Do not enlarge hole when drilling out
insert. Blade will be damaged.
3.
Drill out inside diameter of insert (4). Use 11/32
inch drill and mechanical stop set to 3/16 inch.
4.
Bend locking keys (5) toward center of hole (6)
until keys break off. Use small chisel.
Do not allow blade temperature
to exceed 160ºF (71ºC). Higher
temperature can damage fiberglass.
5.
Heat blade (7) around insert hole (6) to 140º
- 160ºF (60º - 71ºC). Use heat gun. Use
temperature indicating strips (E413) to monitor
temperature.
6.
Remove remaining part of insert (4). Use screw
extractor.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
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