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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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09/30/25

Message Overview:

BRAKE FAULT
(Advisory)

DDG Reference: 32-43-05
Pilot Action (QRH): GEAR 10-21
System Description: 32-43-00 - Brake Control System
Schematic Diagram: [ G5000 ]  [ Global Express ]  [ Global XRS ] SSM 32-43-00-101 - Brake Control System - Electrical Schematic
Wiring Diagram: [ G5000 ]  [ Global Express ]  [ Global XRS ] WM 32-43-00-3_003 - Sheet 3 - Control - [9002]
[ G5000 ]  [ Global Express ]  [ Global XRS ] WM 32-43-03-1_001 - Sheet 1 - Control - ALL

Message Description:

There is a loss of redundancy in the Brake Control System.

Possible Causes:

  • Mechanical Fault
  • Left Main Landing Gear Weight-On-Wheel (L MLG WOW) Sensor Rigging (MT29)
  • Left Main Landing Gear Weight-On-Wheel (L MLG WOW) Sensor Rigging (MT31)
  • Right Main Landing Gear Weight-On-Wheel (R MLG WOW) Sensor Rigging (MT38)
  • Right Main Landing Gear Weight-On-Wheel (R MLG WOW) Sensor Rigging (MT40)
  • System (SYS) 3 Brake Pressure Switch (S5)
  • Parking Brake Pressure Switch (S6)
  • Left Inboard Brake Pressure Transducer 2 (MT51)
  • Left Outboard Brake Pressure Transducer 1 (MT52)
  • Right Outboard Brake Pressure Transducer 4 (MT54)
  • Right Inboard Brake Pressure Transducer 3 (MT55)
  • Brake Accumulator 3 (MT63)
  • Pilot Left Brake Pedal Position Transducer (MT57)
  • Pilot Right Brake Pedal Position Transducer (MT58)
  • Copilot Left Brake Pedal Position Transducer (MT59)
  • Copilot Right Brake Pedal Position Transducer (MT60)
  • Left Inboard (L INBD) Wheel Speed Transducer (P16)
  • Left Outboard (L OUTBD) Wheel Speed Transducer (P17)
  • Right Inboard (R INBD) Wheel Speed Transducer (P18)
  • Right Outboard (R OUTBD) Wheel Speed Transducer (P19)
  • Inboard Brake Shut-Off Valve (SOV) (L13)
  • Outboard Brake Shut-Off Valve (SOV) (L14)
  • Brake Control Unit (BCU) (A71)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-32-0359 - Brake Control System - Data Gathering to Reduce the Brake Control Unit (BCU) No-Fault-Found (NFF) rate
  • AW700-32-0513 - Wheel Speed Transducer - Brake System Nuisance Fault Messages
  • AW700-32-0573 - Main Landing Gear Trailing Arm Water Ingress Survey
  • SB700-31-020 - MODIFICATION - FLIGHT DATA RECORDING (FDR) SYSTEM - INSTALLATION OF THE FORCE TRANSDUCER UNITS (FTU) AND ACTIVATION OF THE CREW FORCE MEASURING SYSTEM (CFMS) 2002

Full Throttle Blog/Forum Articles/Infoservice/Newsletter:

Flight Operation Notifications Manual (FONM):

  • [ G5000 ]  [ Global Express ]  [ Global XRS ] FON 01-14 - GEAR-001 - [BRAKE FAULT] (Advisory/Cyan) Message On Ground

NOTES:

Brake Control System (BCS) NFF Action:

  • To support the technical investigation, FSRs and Service Centers are requested to perform an NVM download, complete a condition report and fill a BCS questionnaire.

  • Download and complete this Water Ingress Survey Form.
  • To avoid unnecessary replacement of BCS part due to Brake related CAS nuisance message, before troubleshooting, follow AW700-32-0513 instructions
  • Proceed to a QAR (if available) download of the last three flights (Aircraft meeting FAR part 135.172)

    • BCU NVM download
    • IAC CAS messages download

Quick Links:

Grounding of the Aircraft [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM10-11-00-867-801
Removal of the Covers and Plugs [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM10-12-00-020-801
Installation of the Covers and Plugs [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM10-12-00-420-801
Standard Aircraft Configuration for Maintenance [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM12-00-00-867-801
Aircraft Walkaround (for Maintenance) [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM12-00-00-867-802
Connect Electrical Power to the Aircraft [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-861-801
Remove the Electrical Power from the Aircraft [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-861-802
Electrical/Electronic Safety Precautions [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-910-801
Electrostatic Discharge Safety Precautions [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-910-802
Operational Test of the Brake System [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-00-710-801
Operational Test of the No. 3 Hydraulic-System Brake Pressure-Switch [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-00-710-802
Removal of the Brake Control Unit [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-01-000-801
Installation of the Brake Control Unit [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-01-400-801
Removal of the Brake-Pedal Position Transducer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-05-000-801
Installation of the Brake-Pedal Position Transducer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-05-400-801
Removal of the Brake Control Valve [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-09-000-801
Installation of the Brake Control Valve [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-09-400-801
Removal of the Brake Pressure Transducer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-17-000-801
Installation of the Brake Pressure Transducer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-17-400-801
Removal of the No. 3 Hydraulic-System Brake Pressure-Switch [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-51-000-801
Installation of the No. 3 Hydraulic-System Brake Pressure-Switch [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-51-400-801
Removal of the Wheel Speed Transducer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-53-000-801
Installation of the Wheel Speed Transducer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-43-53-400-801
Removal of the No. 3 Brake Accumulator [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-44-05-000-801
Installation of the No. 3 Brake Accumulator [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-44-05-400-801
Removal of the Emergency/Parking Brake Pressure Switch [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-44-13-000-801
Installation of the Emergency/Parking Brake Pressure Switch [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM32-44-13-400-801
Access to Active Faults [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-802
Access to Stored Faults [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-803
Access to System Diagnostics [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-804
Flight Deck Effect to Fault Correlations [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-821
Wire Repair - Maintenance Practices - ALL [ G5000 ]  [ Global Express ]  [ Global XRS ] SPM20-12-10-02

Troubleshooting Recommendations:

  1. Using the PMAT, access the Active Faults/Stored Faults as per AMM Tasks.
  2. Select the related CAIMS message below:
  3. Do close out.

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