Key figures: Marc Dubois (captain), Pierre-Cédric Bonin and David Robert (first officers), Bureau d’Enquêtes et d’Analyses (BEA, French civil aviation safety investigation authority), Airbus (manufacturer), Air France (operator)
Summary
Air France Flight 447 was a scheduled international passenger flight from Rio de Janeiro/Galeão International Airport, Brazil, to Paris Charles de Gaulle Airport, France. The aircraft, an Airbus A330-203 registered F-GZCP, departed on the evening of May 31, 2009, and crashed into the South Atlantic Ocean in the early hours of June 1, 2009. All 228 people aboard — 216 passengers and 12 crew — were killed, making it the deadliest accident in Air France’s history and, at the time, the deadliest involving an Airbus A330. The victims represented many nationalities, with the largest groups being French, Brazilian, and German.
The accident sequence began as the aircraft flew through a region of storms near the equator. Ice crystals obstructed the aircraft’s pitot tubes, the sensors that measure airspeed, producing inconsistent readings that caused the autopilot to disconnect and the fly-by-wire system to revert to a degraded control mode. The pilots, suddenly required to fly the airliner manually at high altitude, made sustained nose-up inputs that put the aircraft into an aerodynamic stall. Despite available engine thrust and the eventual return of valid airspeed data, the crew did not recognize the stall or lower the nose to recover, and the aircraft descended into the ocean.
Initial debris and some bodies were located within days, but the main wreckage and the flight recorders lay nearly 3,980 meters (about 13,000 feet) deep and were not found until May 2011, after an extended underwater search. The Bureau d’Enquêtes et d’Analyses (BEA) released its final report on July 5, 2012, attributing the disaster to the temporary loss of airspeed information combined with the crew’s inadequate response, and noting deficiencies in training for high-altitude manual flight and stall recovery.
Significance
The loss of Flight 447 prompted significant changes in commercial aviation safety. The suspect Thales pitot tubes were replaced across affected fleets under airworthiness directives, and the investigation drove new emphasis on pilot training for manual handling at high altitude, recognition of and recovery from aerodynamic stalls, and crew response to unreliable airspeed indications.
The accident also became a landmark case in the study of automation and human factors in aviation. It highlighted the risks that arise when highly automated systems abruptly hand control back to pilots in confusing circumstances, and it informed subsequent industry guidance on the relationship between automation and pilot proficiency. The years-long search for the wreckage and recorders, in some of the deepest waters ever surveyed for an accident investigation, was itself a notable feat of deep-sea recovery.
Sources
- Air France Flight 447 — Wikipedia
- Final Report on the accident on 1 June 2009 to the Airbus A330-203, F-GZCP — BEA (hosted by the FAA)
- Crash of Flight 447 — NOVA, PBS