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If conduct of the flight does not seem to be affected dangerously, the crew must apply the
UNRELIABLE SPEED INDICATION / ADR CHECK procedure (see appendix 9).
For information, the “Memory Item” in the Airbus QRH relative to the same fault is shown
below in the version in force on the date of the accident.
68
2. INITIAL FINDINGS
On the basis of the first factual elements gathered in the course of the investigation, the
following facts have been established:
• The crew possessed the licenses and ratings required to undertake the flight,
• The airplane possessed a valid Certificate of Airworthiness, and had been maintained
in accordance with the regulations,
• the airplane had taken off from Rio de Janeiro without any known technical problems,
except on one of the three radio handling panels,
• no problems were indicated by the crew to Air France or during contacts with the Brazilian
controllers,
• no distress messages were received by the control centres or by other airplanes,
• there were no satellite telephone communications between the airplane and the
ground,
• the last radio exchange between the crew and Brazilian ATC occurred at 1 h 35 min
15 s. The airplane arrived at the edge of radar range of the Brazilian control centres,
• at 2 h 01, the crew tried, without success for the third time, to connect to the Dakar
ATC ADS-C system,
• up to the last automatic position point, received at 2 h 10 min 35 s, the flight had followed
the route indicated in the flight plan,
• the meteorological situation was typical of that encountered in the month of June in
the inter-tropical convergence zone,
• there were powerful cumulonimbus clusters on the route of AF447. Some of them
could have been the centre of some notable turbulence,
• several airplanes that were flying before and after AF 447, at about the same altitude,
altered their routes in order to avoid cloud masses,
• twenty-four automatic maintenance messages were received between 2 h 10 and 2 h
15 via the ACARS system. These messages show inconsistency between the measured
speeds as well as the associated consequences,
• before 2 h 10, no maintenance messages had been received from AF 447, with the
exception of two messages relating to the configuration of the toilets,
• the operator’s and the manufacturer’s procedures mention actions to be undertaken
by the crew when they have doubts as to the speed indications,
• the last ACARS message was received towards 2 h 14 min 28 s,
• the flight was not transferred between the Brazilian and Senegalese control centres,
69
• between 8 h and 8 h 30, the first emergency alert messages were sent by the Madrid
and Brest control centres,
• the first bodies and airplane parts were found on 6 June,
• the elements identified came from all areas of the airplane,
• visual examination showed that the airplane was not destroyed in flight ; it appears to
have struck the surface of the sea in a straight line with high vertical acceleration.
70
List of Appendices
The appendices to this report are available, in French, via the BEA
website.
Appendix 1
Meteorological study undertaken by Météo France
Appendix 2
TEMSI SOUTH AMERICA chart for 1st June at 0 h 00 between FL 250 and 630
Appendix 3
Transcript of radio communications concerning flight AF447
Appendix 4
Chronology of recovery of bodies and airplane parts
Appendix 5
Reference of procedures associated with some ECAM messages
Appendix 6
ATC flight plan supplied by Air France
Appendix 7
Study of dossier routes and associated fuel
Appendix 8
Extract from Air France manual on fuel policy
Appendix 9
Procedure for flight with unreliable IAS / ADR check
Bureau d’Enquêtes et d’Analyses
pour la sécurité de l’aviation civile
Zone Sud - Bâtiment 153
200 rue de Paris
Aéroport du Bourget
93352 Le Bourget Cedex - France
T : +33 1 49 92 72 00 - F : +33 1 49 92 72 03
www.bea.aero
N° ISBN : 978-2-11-098702-0
Ministère de l’écologie, de l’énergie, du développement durable et de la mer, en charge des technologies vertes et des négociations sur le climat
Bureau d’Enquêtes et d’Analyses
pour la sécurité de l’aviation civile
Interim report
f-cp090601ae
on the accident on 1st June 2009
to the Airbus A330-203
registered F-GZCP
operated by Air France
flight AF 447 Rio de Janeiro – Paris
　
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