PILOT’S OPERATING HANDBOOK
SECTION 7
DESCRIPTION
Edition 0 -- October 31, 2013
Rev. 1
Page 7.13.1
7.13 - ICE PROTECTION EQUIPMENT
(Figure 7.13.1)
Ice protection equipment is as follows :
-
Pneumatic deice system for inboard, central and outboard wing and for stabilizers : ”AIRFRAME DE-ICE”
-
Propeller electrical deice system : ”PROP DE-ICE”
-
Windshield electrical deice system : ”WINDSHIELD”
-
Electrical heating system for both pitots and for the stall warning sensor : ”PITOT L HTR” and ”PITOT R &
STALL HTR”
-
Turbine air inlet deice systems : ”INERT SEP”
Deicing check and control panel is located on the lower L.H. side of the instrument panel.
WING AND EMPENNAGE DEICING
A pneumatic deice system assures protection of wing leading edges, horizontal stabilizer, elevator horns and
vertical stabilizer. The system automatically cycles when ”AIRFRAME DE-ICE” switch is set to ON.
The 67-second cycle breaks down in two inflation cycles :
-
a first cycle induces inflation of leading edges deicer boots in horizontal stabilizer, elevator horns, vertical
stabilizer and wing inboard section,
-
the second cycle induces inflation of leading edges deicer boots in wing central and outboard sections.
During each inflation cycle, one of the two corresponding warning lights located above ”AIRFRAME DE-ICE”
switch, remains illuminated.
Wing leading edge icing inspection light - see Chapter 7.8 Paragraph ”EXTERIOR LIGHTING”.
PROPELLER DEICING
Propeller deicing is accomplished through electrical heating of blade roots. This system operates cyclically and
alternately on two opposite blades at the same time. 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.
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.
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