12A-3
FOR TRAINING PURPOSES ONLY
LEARJET 20 SERIES PILOT TRAINING MANUAL
FlightSafety
international
Figure 12A-2.
Pressurization System — SNs 24-140 through -169 and 25-003 through -010
CABIN ALT
CONTROL
NORMAL OUTFLOW INTO
NOSE COMPARTMENT
CABIN PRESSURE
RELIEF VALVE
CABIN AIR EXHAUST
CONTROL VALVE
CABIN
UNDER
PRESS
SWITCH
CABIN
PRESS
115 VAC
*FILTER
UP
ALT
DN
ALT
NORMAL
STATIC SOURCE
ALTERNATE
STATIC SOURCE
CABIN
ALTITUDE
EMERGENCY
CONTROL
VALVE
AUTO
MANUAL
AIRBORNE
LH MAIN
SQUAT SW
ON GROUND
DUMP
CABIN
PRESS
SWITCH
NORMAL
STATIC SOURCE
DUMP INTO
TAILCONE
CABIN SAFETY
VALVE
STATIC PRESSURE
CABIN PRESSURE
CONTROL PRESSURE
LEGEND
CABIN
DUMP
28 VDC
*ON SNs 24-150
THROUGH 24-169, THE
FILTER IS REMOVED
AND THE CABIN AIR EX-
HAUST CONTROL VALVE
IS PLUMBED TO THE
CONDITIONED AIR DIS-
TRIBUTION DUCT.