TM55-2840-251-23
4-6 POWER TURBINE SHROUD (AVIM) (Continued)
4-6-1 INSPECTION
1. Inspect shroud for:
a. Wear
b. Metal pick up on knife
edge lands.
WARNING
Power grinding is hazard-
ous to personnel. Sparks
and metal chips may injure
eyes. Wear approved gog-
gles and hearing protec-
tors. If injury occurs,
get medical attention.
2. Grind shroud (Task 4-1-6) if
pick up present.
3. Replace shroud (Tasks 4-1-6
and 4-7-6) if wear is excessive,
or if grinding to remove pick up
will result in excessive shroud/
rotor clearance.
4. Install Adapter (T.1)(1) and
Cover (T.6)(2).
5. Install Gage (T.13)(1) to
measure upstream lands of shroud
and set to zero.
6. Install Gage (T.13)(1) and
measure smallest diameter of
upstream lands.
NOTE
Replace shroud (Tasks 4-1-6
and 4-7-6) if not concentric
within 0.003 inch.
7. Measure largest diameter of
upstream lands. Remove Gage
(T.13)(1).
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