TM55-2840-251-23
4-5 POWER TURBINE BLADES (AVIM) (Continued)
4-5-1 INSPECTION
CAUTION
Do not remove power tur-
bine blades.
1. The power turbine rotor
assembly shall be rejected for:
a. Axial blade shift in
excess of 0.010 inch
b. Cracks
c. Rippling of blade
trailing edge
d. Damage in fillet area of
any blade.
2. Blades may be repaired if,
only three nicks, not more than
0.015 inch long and 0.005 inch
deep, and/or three dents not more
than 0.010 inch deep are found in
area A.
3. Blades may be further
repaired if, only one nick, dent
or pit, less than 0.020 inch
deep, is found in area B and/or
in leading or trailing edges.
4. Damage not mentioned
previously, or damage in excess
of limits given, shall be cause
for rejection of power turbine
rotor assembly.
4-5-2 REPAIR
Blend out defects using
Crocus Cloth (E.64). Inspect.
FOLLOW ON MAINTENANCE:
Installation Power Turbine Rotor
Assembly (Task 4-4-3)
END OF TASK
4-24
