AIR CONDITIONING AND PRESSURIZATION
Description
Aircraft Operations Manual
2.1
PAGE
6
Jun 01/18
Manual operation
When the AUTO/MAN switch is set to MAN, system
pressurization is manually controlled.
A rotary knob on the pressure control panel is used
to set the pneumatic outflow valve in desired posi-
tion. Rotating the knob clockwise will increase and
counterclockwise will decrease the cabin altitude.
The electro
−
pneumatic outflow valve will remain
closed.
Pressure indication
The pressure system has the following indications:
−
Differential pressure.
−
Cabin altitude.
−
Cabin altitude rate of change.
A cabin pressure warning will alert the crew if cabin
altitude exceeds 10 000 ft or if cabin differential
pressure exceeds 7.5 psi. Any one of these situa-
tions will activate the CABIN PRESS master warn-
ing.
