Learjet 20 Series Pilot Training Manual page 247

CABIN PRESSURE-
RELIEF VALVE
CABIN AIR EXHAUST
CONTROL VALVE
TO CABIN AIR DISTRIBUTION
DUCT (CONDITIONED)
CABIN PRESS
CABIN SAFETY
VALVE
Figure 12A-3.
12A-4
LEARJET 20 SERIES PILOT TRAINING MANUAL
NORMAL OUTFLOW INTO
NOSE COMPARTMENT
UNDER
MANUAL
115 VAC
CABIN ALT
CONTROL
CABIN
DUMP
28VDC
FILTER
DUMP INTO
TAILCONE
Pressurization System — SNs 24-170 through 24B-184, -186, -187,
and -189, and 25-011 through -026 and 25-028
FOR TRAINING PURPOSES ONLY
UP DN
ALT ALT
CABIN ALTITUDE
EMERGENCY SWITCH
CABIN
UNDER
PRESS
SWITCH
CABIN
PRESS
SWITCH
AUTO
AIRBORNE
L MAIN GEAR
SQUAT SWITCH
GND
NORM
SAFETY
SWITCH
DUMP
ABOVE
10,000 FT
BELOW
8,000 FT
INCR
ALT
FlightSafety
international
NORMAL
STATIC SOURCE
ALTERNATE
STATIC SOURCE
LEGEND
STATIC PRESSURE
CABIN PRESSURE
CONTROL PRESSURE
CABIN
SAFETY
VALVE
ANEROID
SWITCH
NORMAL
STATIC SOURCE