Learjet 20 Series Pilot Training Manual page 186

ALC AI
RADOME
OVERBOARD
VENT
Figure 10-12. Alcohol System—SNs 24-181 through 24-349 and 25-025 through 25-226 and
Airplanes Modified for Known Icing Conditions
A float switch in the reservoir illuminates the
ALC AI annunciator when the tank is empty.
The light stays on even if the switch is off as
a reminder to service the reservoir.
When the RADOME position is selected, a
fully serviced reservoir supplies only the
radome with alcohol for approximately two
hours and nine minutes. When positioned to
WSHLD & RADOME, alcohol is also dis-
10-10
LEARJET 20 SERIES PILOT TRAINING MANUAL
LOW-PRESSURE
SWITCH
PRESSURE
RELIEF
FILTER
FOR TRAINING PURPOSES ONLY
PILOT'S EXTERNAL
DEFOG OUTLET
ORIFICE ASSEMBLY
ANTI-ICE
VALVE (N.C.)
WINDSHIELD/RADOME
RADOME
MOTOR-DRIVEN
PUMP
pensed to the pilot's defog outlet via the three-
way valve, and duration of the supply is re-
duced to approximately 45 minutes.
NOTE
This system is still operational if
both emergency pressurization valves
a r e i n e m e rg e n cy ( p r ov i d e d D C
power is available).
FlightSafety
international
OFF
LEGEND
SUPPLY
PRESSURE