TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
ENGINE RUNUP (CONT)
*14. Propeller overspeed governors - Check as follows:
F2,3
a.
Propeller levers - HIGH RPM.
b.
Left propeller governor test switch - Hold in TEST position.
c.
Left engine power lever - Advance until overspeed governor governs propeller (1830 to 1910 RPM).
Observe temperature and torque limits.
d.
Left propeller governor test switch - Release. Propeller RPM should increase.
e.
Left engine power lever - IDLE.
f.
Repeat steps (b) through (e) for right engine.
*15.
Rudder boost - Check as follows:
a.
Rudder boost switch - ON.
b.
Left engine power lever - IDLE.
c.
Condition levers - LOW IDLE.
d.
Right engine power lever - Advance until rudder boost moves right rudder pedal in. The rudder boost
system should activate within the values of N1 and free air temperature specified in figure 1.
e.
Rudder boost switch - OFF. System should deactivate, releasing rudder pressure.
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