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 TM 55-1510-218-MTF
TROUBLESHOOTING
PROCEDURE
REFERENCE
f. Repeat steps b, c, and d for
right engine.
g. Advance each power lever to
above 85 to 90% N1 individu-
ally, with the autofeather
switch in the arm mode. ARM
lights should not illuminate.
With both power levers above
85 to 90% N1. both ARM lights
should illuminate.
h. Retard left power lever below
85% N1. Both lights should ex-
tinguish.
i. Repeat step h. by retarding
right power lever, with left
power lever above 85 to 90%
N1.
14. Propeller overspeed governors -
F1-3
Check as follows:
a. Propeller levers - HIGH RPM.
b. Left propeller governor test
switch - Hold in TEST posi-
tion.
c. Left engine power lever - Ad-
vance until overspeed governor
governs propeller (1830 to
1910 RPM). observe tempera-
ture 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 (c) for
right engine.
2-43
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