TM 55-1520-240-23-3
4-31
REPAIR FORWARD ENGINE MOUNT LUGS (AVIM)
4-31
INITIAL SETUP
Applicable Configurations:
All
Tools:
Micrometer Caliper, 0 to 1 Inch
Materials:
Abrasive Cloth (E1)
Personnel Required:
Medium Helicopter Repairer
Inspector
Equipment Condition:
Engine Work Platform Open (Task 2-2)
Powerplant Removed (Task 4-10)
Forward Engine Mount Cap Assembly Removed
(Task 4-27)
NOTE
Any burnished area must be large
enough to blend smoothly into area
around it.
This task can be used to repair mount
lugs for No. 1 and No. 2 engine.
Mount lugs for No. 1 engine are
shown.
1.
Burnish scratches, nicks, or gouges on engine
mount lugs (1). Do not burnish deeper than
10 percent into lug thickness, or 0.050 inch,
whichever is less.
2.
Measure thickness (2) of burnished area (3) on
lug (1). Record measurement.
3.
Measure thickness (4) of unfurnished area (5) on
lug (1). Record measurement.
4.
Subtract measurement in step 2 from
measurement in step 3. Difference shall not be
more than 0.050 inch, or 10 percent of material
thickness.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
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