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

08/10/21

Message Overview:

Message Name:

CH A&B FAULT

Message Code:

B3-007660

Associated CAS:

AIR COND FAULT
(Advisory)

Reporting LRU: PACK TEMP SNSR
System Description: 21-61-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Both channels of the PACK TEMPERATURE SENSOR are detected failed.

Possible Causes:

  • Pack Temperature Sensors (MT31)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 1
  2. Fault Logged = AIR,TAXI
  3. Status = FAILED/WIRING
  4. Message Type = Fault Message
  5. {Term Definitions}

    1. IAS2A-56 XX 353 10 EXCT XXXX-XXXX XXXX-XXXX TXXX-XXXX 353A: 16; PACK TEMP SNSR B FAIL
    2. IAS1A-51 XX 353 00 EXCT XXXX-XXXX XXXX-XXXX TXXX-XXXX 353A: 16; PACK TEMP SNSR A FAIL

Quick Links:

Removal of the Pack Temperature Sensor AMM 21-52-25-000-801
Installation of the Pack Temperature Sensor AMM 21-52-25-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Both channels of the PACK TEMPERATURE SENSOR are detected failed. Check for sensor failure.

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