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(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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02/08/21

Message Overview:

EMER DEPRESS
(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 ]

Maintenance Description:

The 'EMER DEPRESS' Caution CAS message is posted when the EMER DEPRESS Control Panel Push Button Annunciator (PBA) is pushed.

Possible Causes:

  • EMER DEPRESS switch (SDS3)
  • Pressurization Control Panel (AP9)
  • Cabin Pressure Controller (CPC) 1 (A21)
  • Cabin Pressure Controller (CPC) 2 (A22)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Cabin Pressure Controllers AMM 21-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Cabin Pressure Controllers AMM 21-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the PRESSURIZATION Control Panel AMM 21-31-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the PRESSURIZATION Control Panel AMM 21-31-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Using the PMAT, access CAIMS, select SYST DIAG, select ATA 21, select CPC 1(2), select LRU TEST and select CPC #1(2) CTRL PANEL & OUTFLOW VALVE DATA. Check the status for EMERGENCY DEPRESS (Discrete inputs from control panel).

    1. If the Status is active on only one CPC, continue with next step.
    2. If the status is active on both CPC, go to step 3.

  2. Swap CPC 1 with CPC 2­. Perform step 1 again. Did the active status follow the CPC?

    1. If YES, replace defective CPC.
    2. If NO, continue with next step.

  3. Perform a wiring check of the PRESSURIZATION CONTROL PANEL (AP9).

    1. If wiring defects are found, repair defective wiring as required and do close out.
    2. If no defects are found, continue with next step.

  4. Perform a wiring check between the PRESSURIZATION CONTROL PANEL (AP9) and the CPCs.

    1. If wiring defects are found, repair defective wiring as required and do close out.
    2. If no defects are found, continue with next step.

  5. Replace the PRESSURIZATION CONTROL PANEL (AP9).
  6. Do close out.

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