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

06/03/19

Message Overview:

Fault Message:

CPC2 [NO DATA] /DAU4 [CH B] /WRG

Fault Code:

2138327ABG

Associated CAS:

AUTO PRESS FAIL
(Caution)

AUTO PRESS FAULT
(Advisory)

Reporting LRU: Cabin Pressure Controller (CPC) 2
System Description: 21-31-00
Schematic Diagram: 21-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 31-42-08 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Cabin Pressure Controller (CPC) 2 does not receive the ARINC 429 signal from Data Acquisition Unit (DAU) 4B.

Possible Causes:

  • Cabin Pressure Controller (CPC) 2 (A22)
  • Data Acquisition Unit (DAU) 4 (A31)
  • Data Acquisition Unit (DAU) 4 Channel B
  • Junction Box (JB4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Cabin Pressure Controllers AMM 21-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Cabin Pressure Controllers AMM 21-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Junction Box JB4 AMM 24-00-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB4 AMM 24-00-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Data Acquisition Units (DAU) AMM 31-42-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Data Acquisition Units (DAU) AMM 31-42-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10 [ Global Express ]  [G5000 ]  [Global XRS ]

Troubleshooting Recommendations:

  1. Swap DAU 4 with DAU 3.

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

  2. Swap CPC 2 with CPC 1.

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

  3. Perform wiring checks of the wires between CPC2 and JB4.

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

  4. Perform wiring checks of the wires between JB4 and DAU4.

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

  5. Perform continuity check of JB4.

    1. If there is continuity, repair defective associated wiring and do close out.
    2. If there is no continuity, continue with next step.

  6. Replace JB4.
  7. Do close out.

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