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POWER levers
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TM-1-1510-223-MTF Maintenance Test Flight Manual Army Model RC-12
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Engine anti-ice
TM 1-1510-223-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
RPM). Do not exceed temperature and torque
limits.
d.
PROP GOVERNOR test switch - Release. Verify
that propeller RPM increases.
e.
Left engine POWER lever - IDLE.
f.
Repeat steps b through e for right engine.
* 12. Primary governors - Check as follows:
a.
POWER levers - Set 1500 RPM.
b.
PROP levers - Move aft to detent.
c.
Propeller RPM - Check 1150 +50.
d.
PROP levers - HIGH RPM.
* 13. Propeller low pitch stop - Check one engine at a
time as follows:
a.
Aircraft - Position crosswind.
b.
Read the corrected propeller torque in % at 1500
RPM from figure 1.
c.
PROP lever - HIGH RPM (full forward).
d.
POWER lever - Set 1500 RPM.
e.
Torquemeter - Read and record torque.
f.
POWER lever - IDLE.
g.
Torque reading taken in step e must equal the
corrected torque in step b, within +2%.
2-49

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