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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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03/03/21

Message Overview:

Message Name:

DISAGREE / VALVE OPEN

Message Code:

B3-008167

Associated CAS:

WING SOURCE-XBLEED
(Advisory)

Reporting LRU: WING XVALVE
System Description: 30-12-00
Schematic Diagram: 30-12-00
Wiring Diagram: 30-11-05

Message Description:

The WING CROSS VALVE is detected failed in open position.

Possible Causes:

  • Wing Cross-Bleed Valve (MPE10)
  • Anti-Ice Control Panel (PL19)
  • Integrated Air System Controller 1 (IASC1) (A55)
  • Integrated Air System Controller 2 (IASC2) (A56)
  • Junction Box (JB1)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Integrated Air System (IAS) Controller AMM 21-31-01-000-801
Installation of the Integrated Air System (IAS) Controller AMM 21-31-01-400-801
Removal of the Junction Box JB1 AMM 24-63-01-000-802
Installation of the Junction Box JB1 AMM 24-63-01-400-802
Removal of the Wing Cross-Bleed Valve AMM 30-11-05-000-801
Installation of the Wing Cross-Bleed Valve AMM 30-11-05-400-801
Removal of the Anti-Ice Control Panel AMM 30-11-09-000-801
Installation of the Anti-Ice Control Panel AMM 30-11-09-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Verify XBleed Valve sense line is not obstructed internally, or damaged. Inspect fittings, and pass through for damage.
  2. Manually close the wing cross-bleed valve.
  3. Check for continuity on wing cross-bleed between MPE10J1 pin 4, pin 5.

    1. If there is continuity, go to step 5.
    2. If there is no continuity, continue with next step.

  4. Replace wing cross-bleed valve.

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

  5. Do wiring checks between wing cross bleed valve and JB1. Repair as required.

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

  6. Do wiring checks between JB1 and IASC1. Repair as required.

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

  7. Do wiring checks between JB1 and IASC2. Repair as required.

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

  8. Replace the JB1.

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

  9. Do close out.

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