AIR CONDITIONING AND PRESSURIZATION
Operation
Aircraft Operations Manual
2.2
PAGE
7
Jun 01/17
CONDITIONS
NORMAL PROCEDURES
(Cont’d)
3.
TEMP SELECT switch for desired system
COLD
. . . . . . . . . .
−
Hold the switch in COLD position for 3 sec., thereby setting the valve in
middle position. (Normal travelling time between valve max COLD and max
HOT is 6 sec.)
−
Allow the system to stabilize for approximately 5 min.
4.
Temperature
ADJUST AS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REQUIRED
−
Check CABIN TEMP indicator regularly and adjust temperature as required
by momentarily setting the TEMP SELECT switch in either HOT or COLD
position.
2.5
PRESSURIZA-
TION CONTROL
SYSTEM
NORMAL
OPERATION
Preflight
1.
Cabin pressurization control
CHKD
. . . . . . . . . . . . . . . . . . . . . .
−
Check:
Mode switch in AUTO;
Manual pressurization knob at index, i.e. closed;
Cabin rate set knob at index;
Altitude set knob at departure airfield elevation;
Barometric set knob at QNH.
2.
PRESS DUMP switch
CHECK OFF
. . . . . . . . . . . . . . . . . . . . . . . . . . .
and
GUARDED
After engine start
3.
Cabin pressurization panel
CHKD
. . . . . . . . . . . . . . . . . . . . . . .
−
Check FAULT light to be off.
−
Check differential pressure to indicate max 0.3 psi.
Climb
4.
Cabin pressurization panel
CHKD
. . . . . . . . . . . . . . . . . . . . . . .
−
Check cabin pressure and rate of climb to be normal.
Descent
(Cont’d)