TM 55-1520-240-23-4
5-7
REPAIR ROTARY-WING HEADS
(Continued)
5-7
NOTE
Procedure is similar to repair forward
or aft rotary-wing head. Differences
are noted in text.
Damage limits and refinishing differ
for each area of rotary-wing head.
1.
Repair rotary-wing head (1) as follows:
a.
Blend repair scores, nicks, or gouges so no
sign of damage remains. Rework no deeper
than damage.
b.
Use only crocus cloth (E122) applied with
finger pressure.
c.
Blend with smooth radius at least 10 times
as wide as depth of damage.
d.
Refinish reworked areas as soon as possible.
2.
Follow damage limits and refinishing procedures
for specific areas of rotary-wing head (1) as
described:
a.
Damage to top hub face (2) and bottom hub
face (3) shall not exceed 0.005 inch in depth
by 2.5 inches in length or 0.010 inch in depth
by 1.0 inch in length. Refinish (Task 2-348).
5-40
