TM 55-2840-254-23
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1-93 INSPECT ENGINE HOT END (AVIM) (Continued)
b. Use flashlight and look between fourth stage
turbine rotor blades. Inspect outer shroud
(121).
(1) There shall be no cracks extending
from trailing edge (122) of vane (123)
into weldment (124).
(2) There shall be no vane-to-vane cracks.
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