TM 1-1520-238-MTF
Change 2
4-10
NOTE
During engine start, ANTI-ICE panel ENG
1/ENG 2 advisory lights must be on and
must remain on as PWR lever is advanced
to – IDLE.
a. Advance PWR lever to – FLY.
b. Slowly increase collective until ANTI-ICE
panel ENG 1/ENG 2 advisory lights go off.
c. On ANTI-ICE panel, set ENG INLET switch
to – ON. If ANTI-ICE panel ENG 1/ENG 2
advisory lights come on, the anti-icing
system is working.
10. Torque repeatability check – Perform.
11. Maximum power check – Perform.
12. TGT limiter setting check – Perform.
13. Contingency power check – Perform.
H. HEALTH INDICATOR TEST (HIT) AND ANTI-ICE
CHECK.
Check each engine individually as follows:
1. Position helicopter into prevailing wind.
2. Set ANTI-ICE ENG INLET and HTR switches to
OFF.
3. Set both engine Np/Nr to 100%.
4. Retard PWR lever on engine not being checked
to idle.
5. Increase collective pitch to 60% torque and hold
for at least 30 seconds.
