4C-12 Developed for Training Purposes Leerjet 35/36
February 1998
CAE SimuFlite
Cabin Altitude Warning
(510 Pressurization System)
If the cabin climbs above 8,750 ±250 ft, the manual pressure
aneroid turns on the CAB ALT light, the pressurization system
automatically switches to manual, and the mini-controller is iso-
lated from the outflow valve. The cabin can only be controlled
by the manual control valve (i.e., cherry picker) until the system
is reset at 7,200 ft. If the cabin continues to climb, at 9,500
±250 ft emergency pressurization is actuated. At 10,100 ±250
ft, the cabin altitude warning horn sounds; if the cabin should
climb further, at 11,500 ±1,500 ft, the cabin altitude limiters
cause both outflow valves to close.
Cabin Altitude Warning
(450 Pressurization System)
If the cabin climbs above 10,000 ±500 ft, the cabin altitude horn
sounds and the pressurization system automatically switches
to manual.
If the cabin continues to climb, at 11,500 ±1,500 ft the cabin
altitude limiters cause both outflow valves to close.
Emergency Pressurization
On S/N 35-002 to 106, 108 to 112; 36-002 to 031, windshield
defog air can be routed to the cabin for emergency pressuriza-
tion.
Pushing the IN NORMAL/OUT DEFOG knob in, setting the
windshield heat switch to AUTO, and moving the cabin air
switch to OFF routes windshield defog bleed air into the cabin.
If automatic pressurization fails to maintain cabin altitude, the
outflow valve is controlled by using the manual UP/DN switch.
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