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(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.

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04/26/21

Message Overview:

Message Name:

STALL

Identifier: 276OBS003
Effectivity: AIRCRAFT 20501 - 20999
System: Flight Controls
Associated CAS: None
System Description: 27-31-00
Schematic Diagram: None
Wiring Diagram: 27-32-01

Message Description:

The stall warning computer has sensed a limit angle of attack. This warning will also be accompanied with the activation of the control column stick shaker, if the angle of attack continues to increase, a stall pusher will activate.

As the compensated AOA increases to the second (stick shaker) firing angle, the SPC channel sends a signal to activate its corresponding stick shaker. This causes the corresponding control column to shake. When either channel A or channel B sends a signal to activate the stick shaker, the channel also sends signals to activate the aural warning and visual "STALL" warning on the PFD and to disengage the autopilot.

51_stall

  • Verify logic is correct for stall indication.

Possible Causes:

  • None

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

None

Troubleshooting Recommendations:

  1. As the compensated AOA increases to the second (stick shaker) firing angle, the SPC channel sends a signal to activate its corresponding stick shaker. This causes the corresponding control column to shake. When either channel A or channel B sends a signal to activate the stick shaker, the channel also sends signals to activate the aural warning and visual "STALL" warning on the PFD and to disengage the autopilot.

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