Pilot's Operating Handbook
Section 3
Emergency procedures
EASA Approved
Edition 1 - January 15, 2018
Rev. 2
Page 3.10.5
PRESSU BACKUP
Indicates a GASC system malfunction. The GASC cannot compute optimal cabin
altitude and is automatically set to 9800 ft default value as cabin altitude reference.
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Fly the airplane
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1 -
Continue the flight.
Inform maintenance department before next flight.
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CAUTION
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When the airplane descends below 9800 ft, cabin descent rate
coincides with airplane descent rate. The pilot should take into account
the airplane descent profile in order to avoid pressure annoyance.
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End of procedure.
PIM - DO NOT USE FOR FLIGHT OPERATIONS