TM 1-1520-238-MTF
2-75
Change 1
PROCEDURE
TROUBLESHOOTING
REFERENCE
FLIGHT CHECKS (CONT)
CAUTION
Do not exceed single engine torque of
110% or computed maximum torque
available.
e. Reduce collective to achieve less
than 54% dual engine torque at 80
knots.
f. Retard either engine PWR lever to
IDLE. Verify that engine remains
operational at IDLE.
g. Reduce collective to full down stop.
Stabilize rotor within allowable
limits.
WARNING
If it becomes apparent that Nr will decay
below 94% or exceed 110%, terminate
the test flight, return to base and trouble-
shoot.
h. Retard other engine PWR lever to
IDLE.
i. Maintain stabilized autorotation to
test altitude. Note any abnormal
vibrations encountered and verify
that aircraft remains controllable.
*j. Upon reaching test altitude record
the following:
