Learjet 35A - Page 127

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ANTI-ICE SYSTEMS (CONT)
IF AIRFLOW SHOUlD FAIL
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The pilot's windshield may be anti-iced by the following:
1. WSHlD & RADOME/RADOME Switch - WSHLD & RADOME.
This will anti-ice the radome and the pilot's windshield and give
alcohol flow for approximately 45 minutes. The ALe AI light will
come on when alcohol is depleted.
2.
WSHlD & RADOMEIRADOME Switch - OFF when ALe AI
light illuminates or clear of icing conditions.
• Aircraft 35-107. 35-113 & Subsequent not incorporating
AMK 91-2. Aircraft 36-032 & Subsequent not incorporating
AMK91-2.
The WSHLD HT switch has three positions labeled ON, HOlD, OFF. In
the OFF position, no windshield airflow is available. In the ON position, the
control
valve is fully open allowing maximum airflow to the windshield. The
HOlD position is used to stop the control valve in any position between ful-
ly closed and fully open. If a change in airflow is desired, set switch to OFF
or ON until desired airflow is obtained then set switch to HOLD.
TO ACTIVATE THE SYSTEM
1. WSHLD HT Switch - ON. The green WSHLD HT light will come
on when the control valve begins to open. If the red WSHLD OV
HT light comes on, the overheat shutoff valve will automatically
close until the windshield has cooled, then open again.
2.
To reduce flow in the event of excessive noise or system cycling:
WSHLD HT Switch - OFF, until flow is acceptable, then HOLD.
TO DEACTIVATE THE SYSTEM:
1. WSHlD HT Switch - OFF.
IF AIRFLOW SHOUlD FAIL
The pilot's windshield may be anti-iced by the following:
1. WSHLDIRADOME-RAD Switch - WSHLD/RADOME. This will
anti-ice the radome and pilot's windshield and give alcohol fbw for
apprOximately 45 minutes. The amber ALe AI light will illuminate
when alcohol level is low.
2. WSHLD!RADOME-RAD Switch - OFF when alcohol is depleted
or
clear of icing conditions.
2-70
FAA APPROVED 4-30-76
REISSUED 2-25-81, CHANGE 10