French investigators are looking into an incident involving an Air France Airbus A321, in which the automatic stall protection activated during approach to Paris.
The incident, which occurred on 20 July 2012, is detailed in French accident inquiry board BEA's weekly bulletin.
BEA states that the twinjet (registration F-GTAN) had been approaching Paris Charles de Gaulle airport following a domestic service from Bordeaux.
The autopilot was engaged and autothrottle disconnected, but the aircraft's speed fell away.
BEA says the high-incidence protection on the A321, which prevents excessive angle of attack, activated and the autopilot disengaged.
The crew, it adds, responded by taking control of the aircraft and conducting a normal landing.
BEA's bulletin does not detail the number of occupants on board the aircraft but the authority is classifying the event as a loss-of-control incident.