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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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11/21/25

Message Overview:

Message Name:

[CPC1] OUTFLOW VALVE #2

Message Code:

2137316ABG

Associated CAS:

AUTO PRESS FAIL
(Caution)

AUTO PRESS FAULT
(Advisory)

OUTFLOW VLV 2 FAIL
(Advisory)

Reporting LRU: Cabin Pressure Controller 1
System Description: 21-31-00- Cabin Pressure Control System
Schematic Diagram: [ Global Express ]  [ G5000 ]  [ Global XRS ] 21-31-00  Cabin Pressure Control System
Wiring Diagram: [ Global Express ]  [ G5000 ]  [ Global XRS ] 21-31-0 3 Cabin Pressure Control System

Message Description:

During PBIT, the OFV2 does not respond to test command from CPC1.

Possible Causes:

  • Cabin Pressure Controller 1 (CPC1) (A21)
  • Aft Outflow Valve 2 (OFV2) (L9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None: None

NOTES:

  • CPC in control alternate between CPC 1 and CPC 2

    • CPC1 is used for odd days.
    • CPC2 is used for even days.

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 Outflow Valves AMM 21-31-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Outflow Valves AMM 21-31-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Initiate an IBIT from CPC1. (CPC1 is used for odd days. CPC2 is used for even days). If test passes with CPC1, Interchange CPC1 and CPC2. If problem follows, replace the defective LRU.
  2. Perform wiring checks between CPC1 (A21P1) and Outflow Valve 2 as follows:

    From To Result
    A21P1-39 L9P1-10
    A21P1-46 L9P1-13
    A21P1-31 L9P1-11
    A21P1-38 L9P1-14
    A21P1-25 L9P1-12

    NOTE: Make sure to also check for short circuit to ground on these conductors.

    1. If there is continuity, continue with next step.
    2. If there is no continuity, repair defective wiring as required and do close out.

  3. Replace Outflow Valve 2.
  4. Do close out.

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