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Select color for CAS message that you wish to troubleshoot

(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

07/08/19

Message Overview:

CABIN ALT
(Caution)

DDG Reference: None
Pilot Action (QRH): ENVR 06-8
System Description: 21-31-00
Schematic Diagram: 21-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-31-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The cabin pressure controller (CPC) 1 (2) senses that cabin altitude is ≥ 8200 ft.

Possible Causes:

  • FWD Outflow Valve 1 (L8)
  • AFT Outflow Valve 2 (L9)
  • Safety Valve 1 (L10)
  • Safety Valve 2 (L11)
  • Cabin Pressure Controller (CPC) 1 (A21)
  • Cabin Pressure Controller (CPC) 2 (A22)
  • Passenger, Emergency, and Baggage Door Indication System
  • The Fuselage Leakage Rate is more than the permitted value
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: If the Baggage door, Passenger door or Emergency Exit is not secured closed properly and the status changes from "Closed" to "Open" during take-off, the cabin will not pressurize and the "CABIN ALT" (Caution) CAS message will be triggered during the climb.

Quick Links:

Functional Test of the Cabin Pressure Leakage Rate AMM 21-31-00-720-804 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Clear the CAS and CAIMS faults of Pressurization System.
  2. Verify the door "OPEN" and "CLOSED" indication on the STATUS page for the Passenger door, Baggage door and Emergency exit. If the indication does not match the door position, refer to SmartFix Plus for the CAUTION message for the affected door to continue troubleshooting.
  3. If fault remains, perform the functional test of the cabin pressure leakage rate.
  4. Do close out.

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