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12. Second engine start | Up
TM-1-1520-238-MTF Maintenance Test Flight Manual Helicopter Attack
AH-64A Apache | Next
3. Engine overspeed test |
TM 1-1520-238-MTF
2-59
Change 1
PROCEDURE
TROUBLESHOOTING
REFERENCE
ENGINE RUNUP PILOT
*1. 1 ‘‘G’’ Spring – Check as follows:
a. With minimum friction applied to
both collectives note any tendency
of collective to move up of its own
accord.
b. Increase collective to approximately
25% torque. Note any tendency of
collective to move in either direction
of its own accord.
c. Adjust collective friction to stop
uncommanded collective motion.
*d. Decrease collective to full down
stop. Record flat pitch torque
indications.
*2. Engine chop circuit – Check as follows:
WARNING
To prevent inadvertent chop collar ac-
tivation, chop collar shall be re-safetied
prior to flight.
A11
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