4504 Change 6
481 REPAIR EXIT VANE ASSEMBLY (Continued)
In following step 4., use proper welding
procedure at all times (Ref. TM
Using tungsten inert gas method, weldre-
pair all cracks (6) in inner shroud (9) that
pass on both sides of a single vane (10) and
exceed inspection limits (Ref. Task 480).
Power grinding is hazardous to per-
sonnel. Sparks and metal chips may
injure eyes. If injury occurs, get
Wear goggles and rout cracks (4) to expose
clean, sound base metal. Use portable
electric drill and carbide burr.
Clean chips, dirt, and oil from area to be
welded (Ref. Task 479).
All welds in air flow path must be
Weldrepair. Use welding wire (E61). Weld
any cracks (8) that progress around both
sides of a single vane (10).
Blend excess weldrepair with surrounding
parent metal. Use carborundum stone
Polish repaired area. Use crocus cloth
Fluorescentpenetrant inspect (per para-
graph 212.1.e) weldrepair area (Ref. TM
1150033523). There shall be no cracks.
If cracks are found, repeat steps a. through
END OF TASK