TM 55-2840-231-23
6-14. Fuel Control Max Speed Stop - Check - Continued
Ensure aft engine oil cooler
cowling is secured to prevent
20% N1 fixture red flag from
being blown into oil cooler shaft
area during engine operation.
Overtightening the nut can cause
binding of the throttle shaft.
AIRFRAME/
The helicopter may lift off during
this check if it is not sufficiently
loaded.
Check for max N 1 rpm
with tool installed as
follows:
a. Start engine and
stabilize at idle.
b. Advance throttle as far
as it will go. Adjust beep
to maximum position.
Change 11
6-29