Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 5
Page 7.9.5
CAS messages
are displayed in the MFD CAS window :
-
PRESSU OFF
indicates that the BLEED switch is in the OFF position, or that
the Flow Control and Shut Off Valve (FCSOV) is closed due to a system
malfunction (cabin inlet overtemperature, BDPS or FCSOV failure).
-
CABIN ALTITUDE
indicates that the cabin altitude is over 10000 ft.
-
CABIN DIFF PRESS
indicates that the cabin differential pressure is
over 6.4 psi (441 mb). The DUMP switch could be used in case of necessity to
depressurize the cabin.
-
PRESSU BACKUP
indicates that the GASC is unable to compute optimal
cabin altitude due to a system malfunction. In this condition, the GASC will
control the cabin altitude to a default value of 9800 ft.
-
GAS DEGRADED
indicates that the pressurization system is degraded
without total loss of pressurization, or that the heating system is degraded.
-
GAS EVENT
is displayed 45 seconds after landing if a fault on the Overheat
Thermal Switch was detected by the GASC during flight.
-
MAX DIFF MODE
indicates that the BLEED switch is set to MAX DIFF.
Protection - Safety
As soon as the airplane is on the ground, the cabin is automatically depressurized
though the activation of landing gear switches (airplane on ground), or - if necessary -
by actuating the DUMP switch located on the PRESSURIZATION panel. In normal
operation, this switch is protected and locked by a cover.
Overpressure and negative relief safety are managed by both the OFV and SFV. The
safety functions are ensured by independent pneumatic modules fitted on both
valves, which override the GASC control when necessary.
The DUMP switch allows the pilot to open the OFV in order to depressurize the cabin.
The OFV is fitted with a cabin altitude limitation device which overrides the DUMP
function and forces the closure of the OFV if the cabin altitude reaches 14500 ft.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
