TM 55-1510-221-MTF
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
b.
Switch set to low
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
3-15
