TM 55-2840-254-23
4-51 INSPECT THIRD STAGE POWER TURBINE ROTOR (AVIM)
4-51
INITIAL SETUP
Applicable Configurations:
All
Tools:
Technical Inspection Tool Kit,
NSN 5180-00-323-5114
Outside Micrometer Caliper Set
Personnel Required:
68B30 Aircraft Powerplant Inspector
References:
Task 1-118
Equipment Condition:
Off Engine Task
Materials:
Vexar Nylon Webbing (E56)
1. Inspect third stage power turbine rotor (1) as
follows:
a. Inspect disc (2).
(1)
There shall be no cracks.
(2)
There shall be no burns.
(3)
There shall be no loose or cracked pins
(3).
(4)
There shall be no pitting, nicks or rubs
deeper than 0.010 inch. This limit does
not apply to area (4) where material has
been removed for balancing.
(5)
Inspect pin head area (5). There shall be
no indents deeper than 0.005 inch. There
shall be no indents which do not have a
smooth contour. There shall be no cracks.
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