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Air France 447

Printed page 17. PDF page 19.

the left, probably to avoid returns detected by the weather radar. At 2 h 10 min 05, likely following the obstruction of the Pitot probes by ice crystals, the speed indications were incorrect and some automatic systems disconnected. The aeroplane's
Open official document at PDF page 19Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 197. PDF page 199.

pilot as relief Captain. There was an inconsistency between the speeds measured, likely following the blockage of the Pitot probes by ice crystals. The AP then the A/THR disconnected while the aeroplane was flying at the
Open official document at PDF page 199Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 200. PDF page 202.

succession of events: Temporary inconsistency between the airspeed measurements, likely following the obstruction of the Pitot probes by ice crystals that, in particular, caused the autopilot disconnection and the reconfiguration to alternate law; Inappropriate
Open official document at PDF page 202Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 94. PDF page 96.

period of time. It was not possible to determine which of the two profiles was more likely. Consequently, the evolution of the CAS displayed on the right PFD is partially known for the period from 2 h 10 min 3.5
Open official document at PDF page 96Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447

Air France 447

Printed page 145. PDF page 147.

before 31 December 2003. According to the analysis carried out at the time, the most likely cause of the problem was the presence of ice crystals and/or water in the Goodrich 0851GR type Pitot probes within the upper limits of
Open official document at PDF page 147Final Report: Accident on 1st June 2009 to the Airbus A330-203 registered F-GZCP operated by Air France flight AF 447