TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
c. Torquemeters - Monitor for a 7
to 16% drop in torque with ice
vanes extended.
d.
#1 and #2 ice vane switches -
RETRACT.
e. Torquemeters - Monitor for an
increase in torque.
f.
#1 and #2 ice vane annunciator
lights (green) - Check extin-
guished.
g. Ice vane control circuit break-
ers (2) - Pull.
h. Airspeed - 160 KIAS.
i.
#1 and #2 Ice vane switches -
EXTEND.
j.
#1 and #2 vane fall annuncia-
tor lights (yellow) - Check Illu-
minated within 15 to 40 sec-
onds after ice vane switch
actuation.
k.
Manual engine Ice vane con-
trols - Pull to extend. Pulling
force required to extend the ice
vanes should not be excessive.
l.
#1 and #2 vane fall annuncia-
tor lights (yellow) - Check ex-
tinguished.
m.
#1 and #2 ice vane extended
annunciator lights (green) -
Check illuminated.
n.
#1 and #2 ice vane switches -
RETRACT.
o.
#1 and #2 vane fall annuncia-
tor lights (yellow) - Check
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