TM 55-1520-240-23-4
5-67.1
REPAIR BLADE SPAR ROOT END — MAJOR DAMAGE
(Continued)
5-67.1
1.
Measure distance from root end (1) of blade
(2) to outboard edge of damage area (3). Note
distance.
2.
Measure size and depth of damage area (3), and
proceed as follows:
If damage is as described in steps a,
b, d, or f, repair is not authorized at
this maintenance level. Unauthorized
repairs can cause loss of helicopter
and loss of life.
a.
If distance A is greater than 51 inches,
or damage area (3) is greater than 1
square-inch, the blade is not reparable at
this level of maintenance.
b.
If damage area (3) is within distance B, and
is greater than 0.108 inch deep, the blade is
not reparable at this level of maintenance.
c.
If damage area (3) is within distance B, and
is less than 0.108 inch deep, go to step 3.
d.
If damage area (3) is within distance C, and
is greater than 0.090 inch deep, the blade is
not reparable at this level of maintenance.
e.
If damage area (3) is within distance C, and
is less than 0.090 inch deep, go to step 3.
f.
If damage area (3) is within distance D, and
is greater than 0.072 inch, the blade is not
reparable at this maintenance level.
g.
If damage area (3) is within distance D, and
is less than 0.072 inch, go to step 3.
5-333
