TM 55-1520-240-23-3
4-30
REPAIR FORWARD ENGINE MOUNT STRUCTURE
4-30
INITIAL SETUP
Applicable Configurations:
All
Tools:
Micrometer Caliper, 0 to 1 Inch
Materials:
Abrasive Cloth (E1)
Personnel Required:
Medium Helicopter Repairer (2)
Equipment Condition:
Forward Engine Mount Cap Assembly Removed
(Task 4-27)
Do not burnish deeper than 10
percent into structure thickness.
NOTE
Any burnished area must be large
enough to blend smoothly into area
around it.
Procedure can be used to repair
mount structure for No. 1 and No. 2
engine. Mount structure for No. 1
engine is shown.
1.
Burnish cracks, nicks, or gouges on engine
mount structure (1).
2.
Measure thickness of burnished area (2) on
structure. Record measurement.
3.
Measure thickness of unburnished area (3) on
structure. Record measurement.
4.
Subtract measurement in step 2 from
measurement in step 3. Difference shall not be
more than 10 percent of structure thickness.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
4-167
