TM 55-1510-222-MTF
c. Defective wiring.
d. Defective motor.
e. Defective switch.
C49.
Ventilation blower draws excessive current.
a. Misaligned or preloaded bearings.
b. Defective bearings.
C50.
Ventilation blower runs at reduced speed.
a. Brushes not seated properly.
C51.
Ventilation blower draws excessive current and
runs at high speed.
a. Shorted turns in field windings.
C52.
Ventilation blower draws excessive current and
speed surges.
a. Shorted turns in armature.
C53.
Ventilation blower has excessive vibration.
a. Armature out of balance.
b. Squirrel cage fan damaged.
c. Squirrel cage fan out of balance.
d. Defective bearings.
C54.
Propeller deice inoperative.
a. Circuit breaker tripped.
b. Propeller deice switch defective.
c. Ammeter defective.
d. Defective propeller deice timer.
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