TBM
PILOT’S OPERATING HANDBOOK
700
SECTION 7
DESCRIPTION
Page 7.13.2
Edition 1 -- November 30, 2010
Rev. 0
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 left windshield is deiced electrically by imbedded heating resistors. The
system includes a controller and two heat probes imbedded in the
windshield. It is operated by switch ”WINDSHIELD”.
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 by 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”.
A green light located above switch ”WINDSHIELD” goes on when the heating
resistors are being supplied.
NOTE :
The right windshield may also be deiced (optional), the system is operated
through ”WINDSHIELD” switch.