AIR CONDITIONING AND PRESSURIZATION
Operation
Aircraft Operations Manual
2.2
PAGE
8
Jun 01/17
CONDITIONS
NORMAL PROCEDURES
(Cont’d)
5.
Cabin pressurization panel
SET
. . . . . . . . . . . . . . . . . . . . . . .
−
Set barometric knob to actual QNH for landing airfield.
−
Set altitude knob to airfield elevation.
−
Check cabin pressure and rate of descent to be normal.
After landing
6.
Cabin differential pressure
CHECK MAX
. . . . . . . . . . . . . . . . . . . . . . .
0.3 PSI
2.6
PRESSURIZA-
TION
SYSTEM
MANUAL
OPERATION
In manual operation pressurization is regulated by the pneumatic outflow valve
while the normal electropneumatical outflow valve is closed.
1.
Mode selector switch
MAN
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
This will disconnect the automatic pressure control system.
2.
Manual control knob
ADJUST AS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REQUIRED
−
The system will respond slowly therefore wait between adjustments.
−
Rotating the manual control knob clockwise increases cabin altitude.
−
Rotating the manual control knob counterclockwise decreases cabin alti-
tude.
3.
CABIN ALT/DIFF PRESS indicators
MONITOR
. . . . . . . . . . . . . . .
−
Monitor closely to maintain pressurization at required level. Use the Auto
schedule, 2.2 page 1, as reference.
3.
ABNORMAL OPERATION
For Abnormal Operation, also see section 23, ABNORMAL
PROCEDURES and 24, EMERGENCY PROCEDURES.