TM 55-2840-254-23
4-64 INSPECT FIRST TURBINE DISC ASSEMBLY (AVIM)
4-64
INITIAL SETUP
Applicable Configurations:
All
Tools:
Technical Inspection Tool KIT,
NSN 5180-00-323-5114
Materials:
None
Personnel Required:
68B30 Aircraft Powerplant Inspector
References:
Task 1-118
Equipment Condition:
Off Engine Task
1. Inspect first turbine disc assembly (1) as follows:
a. Inspect 80 blades (2).
(1)
There shall be no nicks, dents, or
scratches deeper than 0.015 inch.
(2)
There shall be no bends or distortion.
(3)
There shall be no cracks.
(4)
There shall be no rubs on blade tips (3)
or blade platform (4) deeper than 0.015
inch.
(5)
There shall be no loss of material due to
burning.
(6)
There shall be no material rollover (5)
on blade tips (3).
(7)
There shall be no bluish-black discolora-
tion in area (6) adjacent to rollover (5).
b. Inspect sealing plate (7). There shall be no
cracks.
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