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 TM 1-1510-223-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
ENGINE RUNUP (CONT)
c.
Check for
proper
pedestal
control
detent
position.
d.
Left PROP lever - HIGH RPM.
e.
Repeat procedure for right propeller.
* 5.
Engine acceleration - Check as follows:
a.
Left POWER lever - Set 64% N1, then rapidly
move lever to maximum forward travel.
Acceleration time required for N, to reach 93.5 %
is 2.5 to 4.0 seconds.
b.
Left POWER lever - Immediately retard to IDLE
as N1 passes through 93.5%.
c.
Repeat procedure for right engine.
* 6.
Engine high idle speed - Check 71 to 73% N1.
* 7.
N1 speed switch (air conditioning) - Check as
follows:
a.
Right engine CONDITION lever - LOW IDLE.
b.
Right engine PROP lever - FEATHER.
c.
CABIN AIR MODE SELECT switch - MANUAL
COOL.
d.
Verify that AIR COND N, LOW annunciator light
is illuminated.
e.
Right engine CONDITION lever - Advance to
increase N1 to above 62%.
2-44
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