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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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Quick Links

02/02/26

Message Overview:

STALL PROTECT FAIL
(Caution)

Reporting LRU: STALL COMPUTER
Pilot Action (QRH): FCTL 07-14
System Description: 27-32-00 - Stall Protection System (SPS)
Schematic Diagram: 27-32-00 - Stall Protection System
Wiring Diagram: 27-32-01 - Stall Protection Computer
27-32-05 - Stick Shaker
27-32-09 - Angle of Attack Sensors
27-32-21 - Trim/Stall Control Panel

Message Description:

The Stall Protection System has a failure in either channel A or channel B, or the pusher or AOA sensor has failed, or miscompare has been detected between essentials inputs or essentials inputs are unavailable.

Possible Causes:

  • Angle-of-Attack Sensor (LH) (AOA) (A141)
  • Angle-of-Attack Sensor (RH) (AOA) (A142)
  • R Pitot Static Probe (A16)
  • Stick Pusher Actuator (SPA) (A181)
  • Integrated Standby Instrument (ISI) (A90)
  • Stall Protection Computer (SPC) (A178)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-27-34-0010 - Integrated Standby Instrument (ISI) Airspeed Indication Fluctuation & Potential STALL PROTECT FAIL and/or RUDDER LIMITER FAULT Message(s)

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

Flight Operation Notifications Manual (FONM): None

NOTES:

  • If CAS message is present on ground, make sure both Angle Of Attack (AOA) Vanes are set to the same level/position.

Quick Links:

General Setup for Maintenance
Standard Aircraft Configuration for Maintenance AMM 12-00-00-867-803
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801
Electrostatic Discharge Safety Precautions AMM 24-00-00-910-802
Maintenance Tasks
Replacement of DC Circuit Breakers AMM 24-65-00-960-801
Operational Test of the Stall Protection System (SPS) AMM 27-32-00-710-801
Functional Test of the Stall Protection System AMM 27-32-00-720-801
Removal of the Stall Protection Computer AMM 27-32-01-000-801
Installation of the Stall Protection Computer AMM 27-32-01-400-801
Removal of the Angle-of-Attack Sensor AMM 27-32-09-000-801
Installation of the Angle-of-Attack Sensor AMM 27-32-09-400-801
Removal of the Stick Pusher Actuator AMM 27-32-13-000-801
Installation of the Stick Pusher Actuator AMM 27-32-13-400-801
Removal of the Integrated Standby Instrument AMM 34-12-01-000-801
Installation of the Integrated Standby Instrument AMM 34-12-01-400-801
Removal of the Air Data Computer AMM 34-13-01-000-801
Installation of the Air Data Computer AMM 34-13-01-400-801

Troubleshooting Recommendations:

  1. Check in the MDC in the current faults and fault history pages for problems related to Stall Protection System.

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