TM 55-2840-254-23
4-47 INSPECT FOURTH STAGE POWER TURBINE NOZZLE (AVIM) (Continued)
4-47
b. Inspect inner shroud to vane brazements (5)
and outer shroud to vane brazements (6) as
follows:
(1)
Determine peg area of vanes (7). Mea-
sure 1 inch in from leading edge (8) and
1.4 inches in from trailing edge (9) at
brazements (5 and 6). Vane peg area is
between measurements.
(2)
Inspect brazements (5) in peg area.
Total length of all cracks in all braze-
ments (5) in peg area shall not be more
than 1.25 inches.
(3)
Inspect brazements (6) in peg area.
Total length of all cracks in all braze-
ments (6) in peg area shall not be more
than 1.50 inches.
c. Inspect areas around bolt holes (10, 11 and
12).
(1)
There shall be no more than one crack
starting from any one hole.
(2)
There shall be no cracks which could re-
sult in material fallout.
(3)
There shall be at least one hole without
cracks separating holes with cracks.
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