TM 55-1520-240-23-4
5-7
REPAIR ROTARY-WING HEADS
(Continued)
5-7
n.
Damage to lugs (22) and outboard housing
areas (23) shall not exceed 0.030 inch in
depth. Rework within this depth does not
require shotpeening. Refinish (Task 2-346).
o.
Damage to housing areas (24 and 25) shall
not exceed 0.005 inch in depth by 2.5 inches
in length. Rework area shall not exceed 1.2
square-inches. Refinish (Task 2-346).
p.
Scores in outboard hub areas (26) shall not
be greater than 0.005 inch by 0.625 inch.
Scores in outboard hub areas shall run
parallel to end caps (12) within 10º. Refinish
(Task 2-348).
q.
Scores in outboard side of lugs (22) shall not
exceed 0.005 inch in depth by 1.0 inch in
length. Scores in outboard side of lugs shall
run parallel to tanks (21) within 10º. Refinish
(Task 2-346).
FOLLOW-ON MAINTENANCE:
Close work platform (Task 2-2).
END OF TASK
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