background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults by MDCBy Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

07/18/19

Message Overview:

MDC Fault Message:

INTERNAL FAULT

Equation ID:

B3-006806

Associated CAS:

None

Reporting LRU: GPS 1
System Description: 34-55-00
Schematic Diagram: 34-55-00
Wiring Diagram: 34-55-01

Message Description:

Left GPS is reporting an internal failure, a RF Interface fault or a sensor fault.

Possible Causes:

  • Left Global Positioning Receiver (GPS 1) (A25)
  • Left Global Positioning Antenna (E3)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Global Positioning Receiver AMM 34-55-01-000-801
Installation of the Global Positioning Receiver AMM 34-55-01-400-801
Removal of the Global Positioning Antenna AMM 34-55-09-000-801
Installation of the Global Positioning Antenna AMM 34-55-09-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

For single GPS installation Aircraft

  1. Reset GPS1 circuit breaker CB1-A3. Is the fault message still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  2. Do wiring check for the following cable between the left Global Positioning Receiver (A25) and the left Global Positioning Antenna (E3):

    From To Result
    Conn. A25CP1 Conn. E3P1

    1. If the check is satisfactory, continue with next step.
    2. If the check is not satisfactory, repair or replace the defective cable.

  3. Replace the Global Positioning Receiver (A25). Is the fault message still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  4. Replace the left Global Positioning Antenna (E3).
  5. Do close out.

For dual GPS installation Aircraft

  1. Reset GPS1 circuit breaker CB1-A3. Is the fault message still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  2. Do wiring check for the following cable between the left Global Positioning Receiver (A25) and the left Global Positioning Antenna (E3):

    From To Result
    Conn. A25CP1 Conn. E3P1

    1. If the check is satisfactory, continue with next step.
    2. If the check is not satisfactory, repair or replace the defective cable.

  3. Swap the left Global Positioning Receiver (A25) with the right Global Positioning Receiver (A24). Is the fault message still present?

    1. If NO, replace the defective Global Positioning Receiver.
    2. If YES, continue with next step.

  4. Replace the left Global Positioning Antenna (E3).
  5. Do close out.

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.