background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults By CAIMS By 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

06/28/19

Message Overview:

Fault Message:

CDU 1/DCPC LEFT FTM-A12/WRG

Fault Code:

2460441DCP

Associated CAS:

ELEC SYS FAULT
(Advisory)

Reporting LRU: Electrical Management System Control-and-Display Unit (EMS CDU) 1
System Description: 24-60-00
Schematic Diagram: 24-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 24-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
24-70-03 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

ARINC 429 communication between the DC Power Center (DCPC) and the Electrical Management System Control-and-Display Unit (EMS CDU) is faulty. The Line Replaceable Unit (LRU) transmits on periodic basis a test label that is turned around by the receiving LRU.

Possible Causes:

  • Electrical Management System Control-and-Display Unit (EMS CDU) 1 (A94)
  • DC Power Center (DCPC) Microprocessor Card
  • Junction Box (JB3)/PCB3
  • DC Power Center (DCPC) (A63)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None.

Forum Articles/Infoservice/Newsletter: None

  1. Make sure the Junction Box #3 is racked properly. Field experience revealed many cases of Junctions Boxes not installed properly.
  2. Flight deck effect:

    1. DC synoptic page all magenta.
    2. On the EMS CDU, DCPC electrical loads are dashed.

  3. Alternative fault confirmation:

    1. On EMS CDU 1, select Diagnostic mode.

      1. Select SYSTEM - CNTL key (page 1/3).
      2. Select lower left side key.
      3. Select lower right side key.

    2. On EMS CDU 1, select CIRCUIT BREAKER - SYS key and COUNTERS.

      1. DCPC IN=0=loss of communication from DCPC left microprocessor to EMS CDU 1.
      2. PCDA OUT=0=loss of communication from EMS CDU 1 to DCPC, DCPC, SPDA 1, SPDA 2, SPDA 3, SPDA 4, EMS CDU 2.

Quick Links:

Removal of the Junction Box JB3 AMM 24-00-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB3 AMM 24-00-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Junction Box JB3 Circuit-Cards AMM 24-00-02-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB3 Circuit-Cards AMM 24-00-02-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) AMM 24-61-00-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) AMM 24-61-00-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) Fault-Tolerant Supervisor AMM 24-61-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) Fault-Tolerant Supervisor AMM 24-61-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) Fault-Tolerant Microprocessor AMM 24-61-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) Fault-Tolerant Microprocessor AMM 24-61-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) Primary Logic AMM 24-61-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) Primary Logic AMM 24-61-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) DC Power Quality Monitor AMM 24-61-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) DC Power Quality Monitor AMM 24-61-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) Battery/Ram-Air-Turbine
Interface Unit		 AMM 24-61-33-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) Battery/Ram-Air-Turbine
Interface Unit		 AMM 24-61-33-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) Secondary-Power
Distribution Assembly (SPDA) Feeder		 AMM 24-61-37-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) Secondary-Power
Distribution Assembly (SPDA) Feeder		 AMM 24-61-37-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) Cabin DC Feeder AMM 24-61-41-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) Cabin DC Feeder AMM 24-61-41-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Electrical Management System Control-and-Display
Units (EMS CDU)		 AMM 24-70-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Electrical Management System Control-and-Display
Units (EMS CDU)		 AMM 24-70-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap EMS CDU 1 with EMS CDU 2.

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

  2. Swap DCPC microprocessor cards.

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

  3. Replace DCPC supervisor card.

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

    For EMI Filter/Wiring check:

  4. Remove both microprocessor cards.
  5. Perform wiring checks between EMS CDU, JB3, SPDA 1, SPDA 2 and DCPC.

    1. If wiring checks are not good, repair defective wiring and do close out.
    2. If wiring checks are good, continue with next step.

  6. Perform wiring checks between DCPC connectors and microprocessors.

    1. If wiring checks are not good, repair defective wiring and do close out.
    2. If wiring checks are good, continue with next step.
      CAUTION: To prevent damage to the DCPC motherboard connectors, ensure that the wire jumper pin outside diameter (OD)/socket inside diameter (ID) does not exceed 0.025 inch.

  7. Replace EMS CDU.

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

  8. Swap SPDA 1 with SPDA 2.

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

  9. Swap SPDA 4 with SPDA 3.

    1. If system checks good, replace SPDA 4 and do close out.
    2. If fault remains, continue with next step.

  10. Replace DCPC.

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

  11. Replace JB3.

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

    For DCPC Data Bus check:

  12. Make sure that the EXT AC cord is not connected to the aircraft.
  13. Remove one of four DCPC SPDA Feeder cards one at a time and set Battery Master Switch to ON to determine faulty SPDA Feeder card.
    NOTE: Monitor the fault via the AC Synoptic page or the Counters (EMS CDU Diagnostic Mode).
  14. Replace defective DCPC SPDA Feeder card.

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

  15. Remove one of three PLC cards one at a time and set Battery Master Switch to ON to determine faulty PLC.
  16. Replace defective PLC.

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

  17. Remove one of two DCPQM cards one at a time and set Battery Master Switch to ON to determine faulty DCPQM.
  18. Replace defective DCPQM cards.

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

  19. Replace Cabin DC Feeder card.

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

  20. Check to see if the fault has gone away.

    1. If YES, replace the defective Cabin DC Feeder card.
    2. If NO, continue with next step.

  21. Replace BATT/RAT card.

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

  22. Replace DCPC.
  23. Do close out.

Detail Troubleshooting with pin assignment

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