I
I
PRESSURIZATION SYSTEM OPERATION (CONT)
lANDING
AT
FIElD
ELEVA110N
ABOVE
8500
FEET
(Aircraft
with
Emel!lency
Pressurization
Override
Switches)
DESCENT
1.
EMER
PRESS Switches -
OVERRIDE.
2.
AUTO-MAN
Switch - MAN.
3.
UP-ON
Manual Control
(red)
- UP to destination
field
elevation.
!!~
•
After
landing, leave
EMER
PRESS switches
in
OVERRIDE
position.
If
the
switches
are
set to
NOR-
MAL above approximately 9500 feet, emergency
pressurization will activate. In the event
of
inadvert-
ent activation
of
emergency
airflow,
the
system
may
be reset as
foDows:
a.
EMER
PRESS Switches -
OVERRIDE.
b. Both
BLEED
AIR
Switches - OFF then
ON.
• Applicable operating rules, pertaining to the
use
of
oxygen at high cabin altitude,
must
be
observed.
TAKEOFF AT
FIElD
ELEVATION
ABOVE
8500
FEET
(Aircraft
with
Emel!lency
Pressurization
Override
Switches)
BEFORE
STARTING
ENGINES
1.
EMER
PRESS Switches -
OVERRIDE.
2.
BLEED
AIR
Switches -
ON.
3.
CAB
AIR
Switch -
OFF.
4.
AlJTO.:MAN
Switch -
MAN.
• Applicable operating rules, pertaining to the
use
of
oxygen at high cabin altitude, must be observed.
• At
field
elevations above
8750
(±250) feet, the auto-
matic pressurization mode
will be deactivated and the
CAB
ALT
light
will
be
illuminated.
5.
CABIN
CONTROLLER - Select cruising altitude or
desired
cabin
altitude.
TAXI
AND
BEFORE
TAKEOFF
1.
CAB
AIR
Switch -
ON.
AFfER
TAKEOFF
1.
UP-ON
Manual Control
(red)
-
ON
to obtain cabin altitude selected
on
CABIN
CONTROLLER.
2-46
FAA
APPROVED
4-30-76
REISSUED
2-25-81,
CHANGE
10
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