TM 55-1520-240-23-5
6-170
COMBINING TRANSMISSION SERVICEABILITY CHECK
6-170
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692
Materials:
Cheesecloth (E112)
Personnel Required:
Medium Helicopter Repairer
Rotary-Wing Aviator (2)
Reference:
Task 2-2
Task 6-72
Task 6-77
Task 6-168
Task 6-169
Task 6-171
Task 6-173
Task 6-174
Task 6-175
Task 6-176
Task 6-178
TM 55-1520-240-10
Equipment Condition:
Battery Disconnected (Task 1-36)
Electrical Power Off
Pylon Access Doors Open (Task 2-2)
1.
Complete steps 1 thru 8 of Task 6-169.
2.
Have pilot perform ground run for 1 hour at
normal rotor rpm (TM 55-1520-240-10). If
combining transmission oil temperature or
pressure changes abnormally during operation,
have pilot shut down helicopter. Check for cause
of change.
3.
Drain oil through cheesecloth (E112) or
similar filter material (Task 6-168). Check for
contamination.
4.
Note if oil filter indicator button (1) is extended. If
button is extended, go to step 5. If button is not
extended, go to step 8.
5.
Replace element in main oil filter (2) (Task
6-171).
6.
Open pylon lower fairing (3) (Task 2-2).
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