ENGINE TRANSMISSION SERVICEABILITY CHECK
Have pilot perform ground run for 1 hour at
normal rotor rpm (TM 55-1520-240-10). If
engine transmission oil temperature or pressure
changes abnormally, or if debris screen or chip
detector light comes on during operation, have
pilot shut down helicopter. Check for cause.
Drain oil through cheesecloth (E112) or
similar filter material (Task 6-196), Check for
Remove element in oil filter (3). If element
contains debris or indicator button (4) was
extended, replace with new element (Task
If element in filter (3) contains debris and
indicator button (4) was also extended, remove,
inspect, and install inlet screen (5) (Tasks 6-209,
6-210, and 6-211).
Remove, inspect, and clean debris detection
screen (1) (Tasks 6-201 and 6-202). Install
screen (Task 6-203).