TM 55-2840-254-23
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INSPECT FOURTH STAGE POWER TURBINE ROTOR (AVIM) (Continued)
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b. Inspect 60 blades (5). There shall be no more
than 12 damaged blades.
(1 )
There shall be no cracks.
(2) There shall be no burns.
(3)
There shall be no bending or distortion.
(4)
There shall be no loss of material.
(5)
There shall be no pitting deeper than
0.005 inch.
(6)
There shall be no pitting, nicks or dents
in inner critical area (6) or outer critical
area (7).
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