2-4 COMPRESSOR ROTOR BLADES (FIRST-STAGE) INSPECTION (AVIM) (Continued)
2-4-1 INSPECTION (Cont)
There are two configurations of blades;
narrow chord or wide chord
2. Damage limits for narrow chord blades are as follows:
a. Multiple superficial leading edge nicks, 0.010
inch maximum depth, on any number of blades.
b. Leading or trailing edge dents, 0.030 inch deep
by 0.040 inch long. Four dents per blade on either
leading or trailing edge on any number of blades.
A dent is considered to be an indentation
caused by impact, in which the parent metal
contour has been displaced.
c. Leading or trailing edge tip curl without signs of
tearing. Maximum permissible deformation is 0.050 inch
on one edge on six blades only.
d. Leading or trailing edge nicks 0.020 inch
maximum depth. No more than two nicks, on either
leading or trailing edge, on any number of blades.
A nick is considered to be a sharp
indentation caused by impact, resulting in
parent metal loss.
e. Cracks are not allowed on any blade.
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