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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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Quick Links

09/10/19

Message Overview:

Fault Message:

[BMC2] CROSSBLEED VALVE CMD /CBV

Fault Code:

3616318BMC

Associated CAS:

APU BLEED SYS FAIL
(Caution)

XBLEED FAIL
(Caution)

BLEED MISCONFIG
(Advisory)

Reporting LRU: Bleed Management Controller (BMC) 2
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 ]

Fault Description:

The Cross Bleed Valve position does not agree with the Bleed Management Controller (BMC) 2 command. Inhibited during Take-off and Landing.

Possible Causes:

  • Cross Bleed Valve (CBV) (L35)
  • Secondary-Power Distribution Assembly (SPDA) 3 (A15)
  • Bleed Management Controller (BMC) 2 (A70)
  • Junction Box (JB4)/PCB2
  • Junction Box (JB4)/PCB3
  • Relay (K15)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-36-0365 - Bleed management controller - Data Gathering to reduce No Fault Found (NFF) rate
  • 700T-0006 - Revision 1 - WING A/ICE FAULT (Advisory) EICAS Messages

Forum Articles/Infoservice/Newsletter:

NOTE: Before removing JB4, replace PCB2 or PCB3 Circuit Card if available.

NOTE: Use spare relay if available.

NOTE: Always verify you are working with the current document revision. Access the CIC website to ensure the latest document revision.

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 Junction Box JB4 Circuit-Cards AMM 24-00-06-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB4 Circuit-Cards AMM 24-00-06-400-801 [ 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 ]
Removal of the Bleed Management Controller AMM 36-11-33-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Bleed Management Controller AMM 36-11-33-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect L35P1 from the XSBLEED valve.
  2. With A/C power on, select the XBLEED switch to "CLSD".
  3. Using a multimeter, measure for 28 VDC between connectors of Cross Bleed Valve as follows:

    From To Expected Result Result
    L35P1-3 L35P1-6 28 VDC

    1. If there is no 28 VDC, go to step 10.
    2. If there is 28 VDC continue with next step.

  4. Select XBLEED switch to "OPEN" and measure for 28 VDC between connectors of Cross Bleed Valve as follows:

    From To Expected Result Result
    L35P1-4 L35P1-6 28 VDC

    1. If there is no 28 VDC, go to step 10.
    2. If there is 28 VDC, continue with next step.

  5. Select XBLEED switch to "CLSD" and connect a ground to L35P1-5.
  6. In CAIMS, go to "SYSTEM DIAG", Chap. 36, BMC 2, "LRU TEST" and on Discrete & Analog input data page, check position of Cross Bleed Valve.

    1. If NO, go to step 8.
    2. If indicated "FULL CLOSED", continue with next step.

  7. Select XBLEED switch to "OPEN", remove the ground from L35P1-5 and connect to L35P1-1. On Discrete & Analog input data page, check position of Cross Bleed Valve.

    1. If indicated "FULL OPEN", replace defective XBLEED VALVE and do close out.
    2. If NO, continue with next step.

  8. Swap BMC 2 and BMC 1.

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

  9. Perform wiring checks of all wires between BMC 2 and the XBLEED VALVE.

    1. If wiring checks are not good, repair defective wiring as required or replace JB4/PCB3 and do close out.
    2. If wiring checks are good, continue with next step.

  10. Swap SPDA 3 and SPDA 4.

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

  11. Perform wiring checks of all wires between SPDA3 and the XBLEED VALVE.

    1. If wiring checks are not good, repair defective wiring as required and continue with next step.
    2. If wiring checks are good, go to step 13.

  12. Replace JB4/PCB2 or JB4/PCB3.

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

  13. Verify relay K15P1 for proper operation.
  14. Do close out.

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