AIR CONDITIONING AND PRESSURIZATION
Operation
Aircraft Operations Manual
2.2
PAGE
5
Jun 01/17
CONDITIONS
NORMAL PROCEDURES
(Cont’d)
2.
Temperature control knobs
SET AS
. . . . . . . . . . . . . . . . . . . . . . .
DESIRED
After engine start
3.
Air conditioning panel
CHKD
. . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Check all caution lights to be off.
4.
RECIRC fans
AS DESIRED
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In flight
5.
Temperature
ADJUST AS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REQUIRED
−
Check CABIN TEMP indicator regularly and adjust temperature as required
with temperature control knob.
Parking
6.
RECIRC fans
BOTH OFF
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
CABIN COOL
DOWN
PROCEDURE
This procedure describes the most efficient way to pull down the temperature to
a comfortable level in a heat soaked parked aircraft. The procedure will also
minimize the amount of moisture and condensation experienced in the air dis-
tribution ducting during temperature pull
−
down in hot and humid conditions.
The procedure assumes right engine running with propeller brake applied.
With HP bleed extracted from the engine, ITT will be high and in some cases
limiting. If ITT is limiting, engine temperature will decrease when closing the X
−
VALVE.
Before embarking passenger
With propeller brake applied and PL set:
1.
Entrance door and cockpit hatches
CLOSED
. . . . . . . . . . . . . . . .
2.
TEMP SELECT switches
AUTO
. . . . . . . . . . . . . . . . . . . . . . . .
3.
Temperature control knobs
COLD
. . . . . . . . . . . . . . . . . . . . . . .
−
Set the knobs to max COLD, index 1.
4.
R BLD VALVE switch
AUTO
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
R HP VALVE switch
AUTO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
L BLD VALVE switch
CLOSED
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
X VALVE switch
OPEN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Cont’d)
