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above the landing field elevation. Both CABIN ALT caution and CABIN ALT warning are limited to
14,500 feet. An advisory message, CAB ALT LEVEL HI is displayed on EICAS, informing the
crew that the warning and caution limits have been reset.
AIR CONDITIONING AND PRESSURIZATION
REV 51, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−6
Volume 2
02−10−49
MODES OF OPERATION (CONT'D)
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.
Landing Sequence at Field Elevation greater than 7,230 Feet
NOTE
This sequence is not active during manual pressurization
operation.
This sequence does not require additional crew action, if the actual landing field elevation was
selected prior to take-off. The scheduled cabin pressure is normally limited to 7,230 feet during
flight and then automatically reset to the landing field elevation.
41,000 feet
CABIN ALTITUDE
7,230 Feet
LANDING ELEVATION 11,000 feet
Landing Elevation 11,000 feet
Example:
CAUTION
WARNING
9,000 feet
8,200 feet
12,470 feet
11,670 feet
10,700 feet
GF0210_056a
CAB ALT LEVEL HI
CABIN ALTITUDE
AIRPLANE ALTITUDE
7,330 feet
The CABIN ALT caution (cabin altitude exceeds limits) is normally set for 8,200 feet and
theCABIN ALT warning is set for 9,000 feet. When the airplane altitude decreases below
41,000 feet, the CABIN ALT caution and CABIN ALT warning start to increase proportionally to
the airplane altitude. The CABIN ALT caution is active up to 1,000 feet above landing field
elevation and the CABIN ALT warning up to 1,800 feet above the landing field elevation. Both
CABIN ALT caution and CABIN ALT warning are limited to 14,500 feet. An advisory message,
CAB ALT LEVEL HI is displayed on EICAS, informing the crew that the warning and caution
limits have been reset.
Landing Sequence at Field Elevation greater than 5,670 Feet − Levelling Off During Descent
NOTE
This sequence is not active during manual pressurization operation.
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual REV 51, Aug 14, 2006
CSP 700−6
Volume 2
02−10−50
MODES OF OPERATION (CONT'D)
Landing Sequence at Field Elevation greater than 5,670 Feet − Levelling Off During Descent
(Cont’d)
If a levelling off occurs above 41,000 feet during descent, the cabin remains at 5,670 feet. If
levelling off occurs at or below 25,000 feet during descent, the cabin remains at current altitude. If
levelling off between 41,000 and 25,000 feet, the cabin altitude will remain at the current altitude
for 3 minutes.
Example:
Less than 3 minutes
Less than 3 minutes
GF0210_057a
41,000 feet
CABIN ALTITUDE
5,670 Feet
LANDING ELEVATION 11,000 feet
CAUTION
WARNING
9,000 feet
8,200 feet
12,470 feet
11,670 feet
10,700 feet
CABIN ALTITUDE
AIRPLANE ALTITUDE
7,330 feet
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.
If a levelling off occurs above 41,000 feet during descent, the cabin remains at 7,230 feet. If
levelling off occurs at or below 25,000 feet during descent, the cabin remains at current altitude. If
levelling off between 41,000 and 25,000 feet, the cabin altitude will remain at the current altitude
for 3 minutes.
Example:
Less than 3 minutes
Less than 3 minutes
GF0210_092
41,000 feet
CABIN ALTITUDE
7,230 Feet
LANDING ELEVATION 11,000 feet
CAUTION
WARNING
9,000 feet
8,200 feet
12,470 feet
11,670 feet
10,700 feet
CABIN ALTITUDE
AIRPLANE ALTITUDE
7,330 feet
AIR CONDITIONING AND PRESSURIZATION
REV 51, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−6
Volume 2
02−10−51
MODES OF OPERATION (CONT'D)
Landing Sequence at Field Elevation greater than 5,670 Feet − Levelling Off During Descent
(Cont’d)
If the levelling off lasts for more than 3 minutes, the cabin altitude will descent for a 5,670 feet
target cabin altitude until aircraft descent is resumed. As cabin altitude reaches 7,330 feet, the
CAB ALT LEVEL HI message will be removed and the CABIN ALT caution and CABIN ALT
warning messages will reset to the normal thresholds of 8,200 feet and 9,000 feet respectively.
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