From Health 201FailSystems

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Incident

Air France 447: autopilot hands a stalled aircraft back to a crew (non-clinical analogue)

Non-clinical analogue. Iced pitot probes caused inconsistent airspeeds, the autopilot disconnected, and the crew did not recognise or recover from a stall.

Sources checked when written 26 September 2026

What happened

NON-CLINICAL ANALOGUE. According to the BEA final report (July 2012), obstruction of the Airbus A330's pitot probes by ice crystals caused a temporary inconsistency in measured airspeeds, which disconnected the autopilot and reconfigured the flight controls to alternate law. The crew's control inputs destabilised the flight path, they did not link the loss of airspeed indications to the relevant procedure, and they did not identify the approach to stall or the stall itself; the aircraft, carrying 228 people, struck the surface of the ocean. The BEA cited an absence of high-altitude manual handling training and of training on the speed-anomaly procedure, task-sharing weakened by startle and incomprehension, the lack of a clear cockpit display of the airspeed inconsistencies, and the crew not taking the stall warning into account.[1,2]

Documented harm

Non-clinical: loss of the aircraft with 228 people on board.

What it teaches

Sources

  1. Final Report: Accident on 1st June 2009 to the Airbus A330-203, flight AF 447 (presentation of the final report). BEA (Bureau d'Enquetes et d'Analyses), 5 July 2012. Primary Official report · link checked 2026-09-26
  2. Safety Investigation Following the Accident on 1st June 2009 to the Airbus A330-203, flight AF447: summary (Le Bourget, 5 July 2012). BEA (copy hosted by humanfactors101.com), 5 July 2012. Primary Official report · link checked 2026-09-26

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