TM 55-2840-254-23
4-56 INSTALL SECOND TURBINE DISC ASSEMBLY (AVIM) (Continued)
4-56
Measure second turbine disc assembly (3)
tip clearance at 0, 45, 90, 135, 180, 225, 270
and 315 degree positions as follows:
a. Insert thickness gage (21) between blade
tip (22) and second turbine nozzle inside
diameter (23).
b. Measure and record minimum tip
clearance while rotating second turbine
disc assembly (3) counterclockwise one
revolution.
c. Tip clearance shall be 0.025 inch minimum.
d. If tip clearance is less than 0.025 inch,
repair second turbine nozzle (Ref. Task
4-60).
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Change 2
