Leerjet 35/36 Developed for Training Purposes 4H-11
February 1998
Ice and Rain Protection
On S/N 35-107, 113 and subsequent; 36-032 and subse-
quent when the WSHLD RADOME/RAD/OFF system switch is
set to RAD, a 1.7 gallon reservoir is pressurized by regulated
engine bleed air and supplies methanol to the radome. In
WSHLD RADOME, operation of the system is the same except
the control valve directs methanol to the windshield and
radome.
When the methanol supply is depleted, a float switch com-
pletes a ground circuit energizing the ALC AI annunciator.
Ice Detection
Ice detection is performed by monitoring the wing heat indica-
tor, horizontal stabilizer heat indicator, windshield ice detection
lights, and wing inspection lights (if installed).
Whenever the BAT switches are on, 28V DC from the Left and
Right Essential buses illuminates a small red light in each
inboard corner of the glareshield that shines upward through
the windshield. As ice accumulates on the windshield a small
red circle appears on the windshield above the light.
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