TM 1-1520-238-MTF
4-29
a. NO. 1 PWR lever – LOCKOUT. Note
Np/NG/Nr increase. Then immediately retard
NO. 1 PWR lever to below ENG 2 torque.
b. NO. 1 PWR lever – Slowly advance above
100% Np until HIGH RPM ROTOR warning
light illuminates.
c. NO. 1 PWR lever – IDLE. Verify NG is at idle
speed.
d. NO. 1 PWR lever – FLY. Note that ECU has
been reset from LOCKOUT.
4. Low Np/NG/Nr audio warning – Check as follows:
After starting engines – Pilot/CPG.
a. ENG 1 FUEL switch – OFF. Verify ENG 1
OUT warning light illuminates and audio
warning is present in both headsets as Np
goes below 94%. Reset audio using pilots
ENG 1 OUT light.
b. NO. 1 PWR lever – OFF.
CAUTION
Avoid prolonged operation at 94% – 96%
Nr with APU running. The APU clutch will
oscillate from engaged to disengaged.
This creates high loads on the clutch and
shall be avoided.
c. NO. 2 PWR lever – Retard. Note LOW RPM
ROTOR warning light illuminates and audio
is present in both headsets when rotor goes
below 94% Nr. Continue retarding PWR
lever to IDLE. Reset audio using pilots ENG
2 OUT warning light.
