TM 1-1520-238-MTF
4-9
a. Operate engine at ground idle speed for 5
minutes and look for oil, air, and/or fuel
leaks. Abort run if oil, air, or fuel leakage is
noted. Check overboard drain for excessive
oil or fuel leakage.
b. Correct all leaks by repeating installation
steps of appropriate procedures.
5. Np governing check – Perform.
a. Set PWR lever to – IDLE.
b. Set collective to full down position.
c. Slowly advance PWR lever to – FLY.
NOTE
The engine control system maintains a
constant Np speed, usually 100%. If Np sta-
bilizes below 96% or above 101%, the Np
governing system is not operating.
6. Torque matching check – Perform.
a. Set both PWR levers to – FLY.
b. Set collective to full down position.
c. Set minimum Np/Nr speed. Refer to
TM 1-1520-238-23.
d. If torque of both engines are within 5% of
each other, torque matching is operating
properly.
7. Engine overspeed check – Perform.
8. ECU lockout system check – Perform.
9. Anti-ice bleed and start valve check.
