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

04/26/21

Message Overview:

Message Name:

AOA

Identifier: 273OBS001
Effectivity: AIRCRAFT 20501 - 20999
System: Flight Controls
Associated CAS: None
System Description: 27-31-00
Schematic Diagram: 27-32-00
Wiring Diagram: 27-32-01

Message Description:

A failure of low speed awareness cue signal to the PFD has occurred.

  • Both lines of data have failed and the low speed awareness tape is removed being replaced by the red 'AOA' flag.

01_aoa

Possible Causes:

  • Air Data Computer (ADC) system component
  • Stall Protection Computer (SPC) system component
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: The Stall Protection System provides AOA based flight data over ARINC 429 bus to the IOC's Channel A, the pilots channel goes to the left IOC, and channel B goes to the right IOC. The IOCs process the information and send it to the PFD for Low Speed Awareness - stall warning speed (VSW) ratio.

Quick Links:

None

Troubleshooting Recommendations:

  1. Access the MDC to view fault messages.
  2. Look for any faults related to the ADC system or SPC system.
  3. Troubleshoot these messages using the appropriate SmartFix Plus troubleshooting page.
  4. Do close out.

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