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selection on the Pressurization Control Panel. In the HIGH position, the rate limits are up to +800
fpm and −800 fpm. The cabin rate will vary between these two limits as required to maintain the
pressurization schedule.
GF0210_062a
3600
1.02
800
200
CAB ALT
P
CAB RATE
LDG ELEV
HIGH: 800 ft/min up, 800 ft/min down. HIGH
NORM
RATE
With Landing Elevation set to 5,674 feet or higher, the cabin rate of change is automatically
controlled by the CPC independent of CPC RATE selection when the airplane is descending with
cabin altitude higher than 5,674 feet.
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual REV 51, Aug 14, 2006
CSP 700−6
Volume 2
02−10−54
MODES OF OPERATION (CONT'D)
Rate Limit Selection (Cont’d)
The rate of climb is automatically limited to:
• 540 fpm if airplane vertical speed is ≤ −1150 fpm.
• 2457 fpm if airplane vertical speed is ≥ −3450 fpm.
• Between the above values the cabin rate of change is proportional to airplane vertical
speed.
The rate of descent is automatically limited to:
• 300 fpm if airplane vertical speed is ≤ +1428 fpm.
• 1260 fpm if airplane vertical speed is ≥ +6000 fpm.
• Between the above values the cabin rate of change is proportional to airplane vertical
speed.
Effectivity:
• Airplanes 9002 thru 9158 not incorporating Service Bulletin:
• SB 700−21−034, Modification − Pressurization Control − Cabin Altitude Reduction
During Flight for Improved Passenger Comfort.
During High Elevation Airfield operation, with CAB ALT LEVEL HI advisory message
displayed, the cabin rate of change is automatically controlled by the CPC independent of CPC
RATE selection.
The rate of climb is automatically limited to:
• 540 fpm if airplane vertical speed is ≤ −2570 fpm.
• 1260 fpm if airplane vertical speed is ≥ −6000 fpm.
• Between the above values the cabin rate of change is proportional to airplane vertical
speed.
The rate of descent is automatically limited to:
• 300 fpm if airplane vertical speed is ≤ +1428 fpm.
• 1260 fpm if airplane vertical speed is ≥ +6000 fpm.
• Between the above values the cabin rate of change is proportional to airplane vertical
speed.
Landing Elevation
Landing elevation information is transmitted by the FMS or from the manual selection on the
Pressurization Control Panel. The value used for pressurization control by the CPCs is displayed
on the STAT page.
GF0210_063
3600
1.02
300
200
CAB ALT
P
CAB RATE
LDG ELEV
LDG ELEV
Digital readout in
10 foot increments.
AIR CONDITIONING AND PRESSURIZATION
REV 51, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−6
Volume 2
02−10−55
MODES OF OPERATION (CONT'D)
Landing Elevation (Cont’d)
When the LDG ELEV FMS/MAN selector is set to FMS, the landing destination information has
been programmed in the FMS and the flight plan activated, the LDG ELEV is displayed on the
STAT page.
GF0210_064
1300
0.10
300
120
CAB ALT
P
CAB RATE
LDG ELEV
ACTIVE FLT PLAN 5/6
CYUL
DEPARTURE PERF INIT
DEST
MAN
FMS
UP
DN
LDG ELEV
When the LDG ELEV FMS/MAN selector is set to MAN, the LDG ELEV selection is made from the
Pressurization Control Panel. The LDG ELEV is defaulted to 0 feet on the ground and 5,670 feet in
flight. A message is displayed on EICAS and will remain posted until a selection of UP or DN.
Effectivity:
• Airplanes 9002 thru 9158 not incorporating Service Bulletin:
• SB 700−21−034, Modification − Pressurization Control − Cabin Altitude Reduction During
Flight for Improved Passenger Comfort.
When the LDG ELEV FMS/MAN selector is set to MAN, the LDG ELEV selection is made from
the Pressurization Control Panel. The LDG ELEV is defaulted to 0 feet on the ground and 7,230
feet in flight. A message is displayed on EICAS and will remain posted until a selection of UP or
DN.
GF0210_065
8300
0.08
300
7230
CAB ALT
P
CAB RATE
LDG ELEV
SET LDG ELEV
MAN
FMS
UP
DN
LDG ELEV
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual REV 51, Aug 14, 2006
CSP 700−6
Volume 2
02−10−56
MODES OF OPERATION (CONT'D)
Landing Elevation (Cont’d)
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