TM 55-2840-254-23
1-93
1-93 INSPECT ENGINE HOT END (AVIM) (Continued)
6. Inspect aft side (41) of first turbine disc assem-
bly (36) as follows:
NOTE
Do not remove first turbine disc assembly
unless it fails to meet these inspection
limits.
a. Inspect blades (42).
There shall be no nicks, dents, or
(1)
scratches deeper than 0.015 inch.
There shall be no bends or distortion.
(2)
There shall be no cracks.
(3)
There shall be no rubs on blade tips (43)
(4)
or blade platform (44) deeper than
0.015 inch.
(5) There shall be no loss of material due to
burning.
(6) There shall be no material rollover (45)
on blade tips (43).
There shall be no bluish-black discolora-
(7)
tion in area (46) adjacent to rollover
(45).
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