TM 1-2840-252-23-2
4-62
INSTALL SECOND TURBINE NOZZLE, SPACER, CASE, AND BUMPER
4-62
(AVIM)
Measure first turbine disc assembly (4) tip
11.
clearance at 0, 45, 90, 135, 180, 225, 270, and
315
degree positions as follows.
a.
Insert thickness gage (Appendix E) (5) between
second turbine nozzle vanes (12) and between
blade
tip (6) and turbine rotor case inside diameter (7).
b.
Rotate
first
turbine
disc
assembly
(4)
counterclockwise
one revolution for each check. Tip
clearance shall be
0.019 inch minimum.
If tip clearance is less than 0.019 inch, repair
c.
first
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