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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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03/10/21

Message Overview:

Message Name:

L IB BRAKE PRESS XDCR

Message Code:

B3-007103

Associated CAS:

BRAKE FAULT
(Advisory)

Reporting LRU: L IB BK PR XDCR2
System Description: 32-43-00
Schematic Diagram: 32-43-00
Wiring Diagram: 32-43-17

Message Description:

The Left Inboard Brake Pressure Transducer fault detected by the Brake Control Unit.

Possible Causes:

  • Left Brake Pressure Transducer (MT99)
  • Brake Control Unit (BCU) (A67)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Brake Control Unit AMM 32-43-01-000-801
Installation of the Brake Control Unit AMM 32-43-01-400-801
Removal of the Brake Control Valve AMM 32-43-09-000-801
Installation of the Brake Control Valve AMM 32-43-09-400-801
Data Download from the Maintenance Diagnostic Computer (MDC) AMM 45-45-01-970-802
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Electrical Wiring - Continuity Test - Adjustment/Test SPM 20-12-01-05
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Swap left and right inboard pressure transducers

    1. If problem follows, replace pressure transducer.
    2. If problem does not follow, go to next step.

  2. Verify wiring per the following table:

    From (L IB PRESS XDCR) Pin To (BCU) Pin
    MT99P1 1 A67P2 33
    MT99P1 2 A67P2 34
    MT99P1 3 A67P2 44
    MT99P1 4 A67P2 45

    1. Repair as required.
    2. If wiring is found serviceable, go to next step.

  3. Replace BCU.

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