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

01/20/25

Message Overview:

Message Name:

DISAGREE / VALVE CLOSED

Message Code:

B3-007684

Associated CAS:

RAM AIR FAIL
(Advisory)

Reporting LRU: RAM AIR VALVE
System Description: 21-61-00 - Temperature Control And Indication
Schematic Diagram: 21-53-00 - Ram-Air System 
Wiring Diagram: 21-53-21 - Emergency Ram-Air Valve

Message Description:

The emergency RAM AIR VALVE is detected failed closed by the Data Concentrator Unit or the discrete wiring to the Data Concentrator Unit is failed.

Possible Causes:

  • Data Concentrator Unit (DCU) (A14)
  • Ram Air Valve (RAV) (MPE40)
  • Position Switch
  • Bleed/Air Conditioning Panel (PL17)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

Fault Confirmation Procedure:

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

    1. DWDC2-19 2X 111 00 EXCT XXXX-XXXX XXXT-XXXX XXXX-XXXX 111B: 21;RAM AIR SELECTED ON
    2. DWDC2-15 2X 110 00 EXCT XXXX-XXXT XXXX-XXXX XXXX-XXXX 110R: 25;RAV OPEN

Quick Links:

Standard Aircraft Configuration for Maintenance AMM 12-00-00-867-803
Removal of the Ram-Air Regulating-Valve AMM 21-53-05-000-801
Installation of the Ram-Air Regulating-Valve AMM 21-53-05-400-801
Deactivation of the Ram-Air Regulating Valve AMM 21-53-05-040-801
Activation of the Ram-Air Regulating Valve AMM 21-53-05-440-801
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801
Electrostatic-Discharge Safety Precautions AMM 24-00-00-910-802
Connect Electrical Power to the Aircraft AMM 24-00-00-861-801
Remove the Electrical Power from the Aircraft AMM 24-00-00-861-802
Removal of the Data Concentrator Unit (DCU) AMM 31-41-01-000-802
Installation of the Data Concentrator Unit (DCU) AMM 31-41-01-400-802
Removal of the Bleed-Air Control Panel AMM 36-11-57-000-801
Installation of the Bleed-Air Control Panel AMM 36-11-57-400-801

Troubleshooting Recommendations:

  1. Logic: NOT RAV_OPEN AND Ram_Air_Selected_ON.
  2. The emergency RAM AIR VALVE is detected failed closed by the Data Concentrator Unit or the discrete wiring to the Data Concentrator Unit is failed.
  3. Check valve or position switch or wiring between the valve and the bleed/air conditioning panel.

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