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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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07/02/21

Message Overview:

Message Name:

CBV FAILED IN OPEN POSITION

Message Code: 361OBS002
Effectivity: All
System: Bleed Air System
System Description: 36-11-00
Schematic Diagram: 36-11-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 30-11-04 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The Cross Bleed Valve failed in the open position.

Possible Causes:

  • Secondary Power Distribution Assemblies (SPDA) 3 (A15)
  • Cross Bleed Valve (L35)
  • Junction Box (K15/JB4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Junction Box JB4 AMM 24-00-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB4 AMM 24-00-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Secondary-Power Distribution Assemblies AMM 24-62-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Secondary-Power Distribution Assemblies AMM 24-62-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Cross-Bleed Valve AMM 36-11-29-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Cross-Bleed Valve AMM 36-11-29-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. On the BLEED AIR control panel, set the XBLEED switch to the CLSD position.
  2. Measure for 28 VDC at CBV L35P1-3.

    1. If no 28 VDC, repair or replace the defective wiring as required and do close out.
    2. If there is 28 VDC, continue with next step.

  3. Perform wiring checks between SPDA 3, JB4, CBV and GS423.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.
      NOTE: Remove all interface components for short circuit test.

  4. Swap SPDA 3 with SPDA 1.

    1. If system checks are good, replace SPDA 3 and do close out.
    2. If fault remains, continue with next step.

  5. Replace CBV.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  6. Replace Junction Box JB4 (K15/JB4).
  7. Do close out.

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