Learjet 20 Series Pilot Training Manual page 200

IN
PILOT AND COPILOT
OUT
PILOT
PILOT'S
EXTERNAL OUTLET
WINDSHIELD
INTERNAL OUTLET
CONDITIONED AIR FROM
CABIN DISTRIBUTION SYSTEM
DEFOG
EMER CAB PRESS
EXT DEFOG–ON
LH
ENGINE
Figure 10A-7. Defog System—SNs 24-100 through -180, and 25-003 through -024
LEARJET 20 SERIES PILOT TRAINING MANUAL
CHECK
OFF
FOOTWARMERS
VALVE
TO WIND LE
HEAT DUCT
BLEED AIR
CHECK VALVE
FLOW CONTROL
FOR TRAINING PURPOSES ONLY
W/S O'HEAT
IN
NORMAL
OUT
DEFOG
CHECK
VALVE
DEFOG
BLEED-AIR
MANIFOLD
BLEED AIR
TO CABIN
VALVE
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COPILOT'S
EXTERNAL OUTLET
RH
ENGINE
10A-7