4-52 REPAIR THIRD STAGE POWER TURBINE ROTOR (AVIM) (Continued)
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:
Blend all sharp edges (21). Use carbor-
undum stone (E10).
Polish to smooth finish. Use crocus
All seals can be blend repaired. One seal
(20) must have at least 0.010 inch ma-
terial remaining after repair.
END OF TASK