TM 1-1510-225-CL
E-20
BELOW 18 AMPS:
15.
Operation – Continue.
16.
RPM – Increase (briefly to aid in ice
removal, if propeller imbalance occurs).
OVER 24 AMPS
17.
Monitor – Continue operation if the PROP
deice circuit breaker switch does not trip.
18.
RPM – Increase (briefly to aid in ice
removal, if propeller imbalance occurs).
19.
Loadmeter – Monitor for excessive current
drain. If the PROP AUTO deice circuit breaker
switch trips, use the manual system.
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.
