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

03/03/21

Message Overview:

Message Name:

DC MOTOR PUMP BRUSH WEAR
(Service Message)

Message Code:

B3-007022

Associated CAS:

None

Reporting LRU: L DC MOTOR PUMP
System Description: 29-12-00
Schematic Diagram: 29-12-00
Wiring Diagram: 29-12-05

Message Description:

The left DC motor pump brush wear discrete signal is active. DC motor must be replaced.

Possible Causes:

  • Left DC Motor Driven-Pump (DCMP) (20 hour extension from original MDC posting) (A71)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

When sumping water from affected fuel tank it is preferable to have the fuel probe immersed in fuel, in order for the water to pool at the bottom of the fuel tank.

To get most of the water to the bottom of the tank, do not move aircraft for at least 2 hours before sumping.

Quick Links:

Removal of the DC Motor-Driven Pumps AMM 29-12-05-000-801
Installation of the DC Motor-Driven Pumps AMM 29-12-05-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Gain access to the MDC by pushing the AICE, ECS and FUEL buttons simultaneously on the Cursor Control Panel.
  2. Select the CURRENT SERVICE MESSAGES.
  3. Validate that the message L DC MOTOR PUMP BRUSH WEAR is not displayed.
  4. If the message is posted in the MDC, proceed with the troubleshooting procedure.
  5. Pull CB2-C11
  6. Disconnect connector A71P1 from the left DCMP. Perform a continuity check between A71 pin C and S2.

    1. If there is continuity, replace the DCMP per AMM within the next 20 flight hours (since original posting of the message in the MDC).
    2. If there is no continuity, make sure that A71P1 pin C is not grounded.

  7. If A71P1 pin C is grounded, repair wiring and repeat troubleshooting procedure.

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