TM 55-2840-254-23
4-52 REPAIR THIRD STAGE POWER TURBINE ROTOR (AVIM) (Continued)
4-52
NOTE
Repair is allowed to any depth provided
no cracks are visible.
c. Repair labyrinth seals (20). Repair cracks
(19) in labyrinth seals (20) as follows:
(1)
Blend all sharp edges (21). Use carbor-
undum stone (E10).
(2)
Polish to smooth finish. Use crocus
cloth (E15).
(3)
All seals can be blend repaired. One seal
(20) must have at least 0.010 inch ma-
terial remaining after repair.
INSPECT
FOLLOW-ON MAINTENANCE
None
END OF TASK
4-312
