Pilot's Operating Handbook
Section 7
Description
Edition 0 - March 05, 2019
Rev. 2
Page 7.10.4
The GASC controls the OFV through a torque motor on the valve.
Cabin altitude management
In order to maximize comfort during all phases of flight, the cabin altitude is
automatically computed by the GASC using flight parameters (such as aircraft
altitude, altitude rate of change) sent by the avionics.
During descent, the GASC uses the Landing Field Elevation (LFE) to manage the
optimal cabin altitude rate of change in order to land 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 information related to the pressurization system through gauges
and information displayed on the MFD :
- landing field altitude,
- cabin altitude in ft,
- cabin climb speed in ft/min,
- cabin differential pressure (ΔP) in PSI.
These gauges are independent of the GASC controls and internal sensors.
Figure 7.10.1 - Cabin altitude monitoring
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