Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 5
Page 7.9.4
Cabin altitude management
To maximize comfort during all phases of flight, the cabin altitude is automatically
computed by the GASC using flight parameters (such as airplane altitude, altitude rate
of change) provided by the avionics.
During descent, the GASC uses the Landing Field Elevation (LFE) to manage the
optimal cabin altitude rate of change so that the airplane lands with a cabin altitude
equal to LFE minus 200 ft.
The pilot selects LFE on the touchscreen controller :
-
automatically, by setting a destination airport in the flight plan,
-
manually, by pressing ”MFD Home,” ”Aircraft Systems,” ”Landing Field Elev”
and then ”Manual.”
System monitoring
The pilot monitors the pressurization system through information displayed on the
MFD :
-
landing field altitude in ft,
-
cabin altitude in ft,
-
cabin climb speed in ft/min,
-
cabin differential pressure (
Δ
P) in PSI.
These indications are independent of the GASC controls and internal sensors.
Figure 7.9.1 - Cabin altitude monitoring
PIM - DO NOT USE FOR FLIGHT OPERATIONS
