TM 55-1520-240-23-4
5-7
REPAIR ROTARY-WING HEADS
(Continued)
5-7
f.
Damage to horizontal pin caps (12) shall not
exceed 0.010 inch in depth by 2.5 inches in
length. Refinish (Task 2-343).
g.
Damage to pitch shafts (13) shall not
exceed 0.005 inch in depth by 2.5 inches
in length. Rework area shall not exceed 1.0
square-inch. Refinish (Task 2-346).
h.
Damage to edges of three pitch arms
(14) shall not exceed 0.050 inch in depth.
Refinish (Task 2-346).
i.
Damage to edge of pitch arm (15) where
washer contacts arm when pitch link bolt
is installed shall not exceed 0.060 inch in
depth. Refinish (Task 2-346).
j.
Damage to arm faces (16) around bolt
hole shall not exceed 0.040 inch in depth.
Refinish (Task 2-346).
k.
Damage to remaining areas (17) of pitch
arm (15) shall not exceed 0.050 inch in
depth. Rework area shall not exceed 1.2
square-inches. Refinish (Task 2-346).
k.1.
Damage to fillet areas (17.1) where pitch arm
blends into housing shall not exceed 0.010
inch in depth. Repairs more than 0.005 inch
deep require shotpeening. Refinish (Task
2-346).
l.
Damage to six lugs (18), pockets (19), and
center housing areas (20) shall not exceed
0.003 inch in depth. Rework area shall not
exceed 1.2 square-inches. Refinish (Task
2-346).
m.
Damage to tanks (21) shall not exceed
0.020 inch in depth by 2.5 inches in length.
Refinish (Task 2-353).
5-42
