TM 1-1510-225-CL
E-20
10. If the PROP AUTO deice control circuit breaker
or the left or right prop deice circuit breaker trips,
avoid icing conditions.
ELECTROTHERMAL
PROPELLER
DEICE
MANUAL SYSTEM OPERATION
1. Manual propeller deice switch – Hold in MANUAL
position for approximately 90 seconds, or until ice
is dislodged from blades.
2. Manual system current requirement – Monitor the
aircraft’s loadmeters when the manual deice
switch is in the MANUAL position. A small
needle deflection (approximately 5%) indicates
the system is functioning.
