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Pilot's Operating Handbook
Section 7
Description
Edition 0 - October 31, 2013
Rev. 6
Page 7.13.2
Propeller deicing
Propeller deicing is accomplished through electrical heating of blade roots. This
system operates cyclically and alternately on the inboard and outboard zones of all
blades. Each cycle is 180 seconds long. The system operation is correct when green
warning light located above PROP DE ICE switch illuminates. The cycles continue as
long as the switch remains set to ON.
PROP DEICE ON
illuminates if the engine is shut down with PROP DE ICE switch
still ON.
▲
CAUTION
▲
When engine is shutdown, do not set the PROP DE ICE switch to ON
for more than 10 seconds, damage to the propeller blades could result.
▲
Windshield deicing
The windshields are deiced electrically by integrated heating resistors. The system
includes a controller and two heat probes embedded in each windshield. They are
operated by the WINDSHIELD switch.
When the switch is positioned to ON, the controller supplies the heating resistors, the
windshield temperature is monitored by probe 1. When the temperature reaches
45°C (113°F), the controller cuts the electrical supply to the heating resistors and
resumes supply when the temperature falls below 30°C (86°F). The cycle continues
as long as the switch remains set to ON.
In the event of failure of probe 1, the controller receives the temperature data from
probe 2. The electrical supply to the heating resistors is cut when the windshield
temperature reaches 56°C (133°F). In that case, the windshield is no longer heated,
the pilot can reset the system by setting the switch to OFF, then to ON.
Two green lights located above the WINDSHIELD switch go on when the
corresponding heating resistors are being supplied.
PIM - DO NOT USE FOR FLIGHT OPERATIONS