By Daily Mail and Sapa-AP
Buffeted by 160km/h winds in a ferocious storm, the 228 people on board Air France Flight 447 went through at least 14 minutes of hell before they plunged into the Atlantic Ocean.
This is the story revealed by French and Brazilian officials, who described a "burst" of messages from Flight 447 just before it disappeared early on Monday.
A more complete chronology was published on Wednesday by Brazil's O Estado de S Paulo newspaper, citing an unidentified Air France source. The chronology was confirmed by an aviation industry source with knowledge of the investigation:
| 'One theory is that the jet was downed by a mid-air collision' | The summary points to the series of failures that led to the "catastrophic events".
Here are the last 14 minutes as recorded on the ground. The times are all local.
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11 pm: The pilot sends a manual signal saying the jet was flying through CBs - towering cumulonimbus thunderheads.
11.10: A cascade of automatic messages indicate trouble: The autopilot had disengaged, stabilising controls were damaged, flight systems deteriorated.
11.13: Messages report more problems: The system that monitors speed, altitude and direction failed. The main flight computer and wing spoilers failed.
11.13: The final message indicates a loss of cabin pressure and complete system failure - catastrophic events in a plane that was probably already plunging toward the ocean.
The disaster could have been caused by the storm - or by a bomb.
It was revealed on Wednesday that Air France received a bomb threat four days before Flight 447 plunged into the Atlantic off the coast of Brazil.
The telephone warning targeted a flight from Buenos Aires that was also travelling to Paris.
Although that plane arrived safely on May 27, the news fuelled speculation that there may be a more sinister explanation for why the Airbus from Rio de Janeiro vanished from radar screens.
Aviation experts said the vast area over which debris had been found suggested that there was an in-flight explosion, but that did not mean a bomb had to be the cause.
The explosion and resulting break-up could have resulted from a massive depressurisation inside the plane for another reason.
If this happened at high altitude, the passengers would have fallen unconscious instantly and may have been oblivious to their fate.
The area into which the Airbus flew is known as the birthplace of some of the world's strongest storms - and the plane would have encountered a 644km-long maze of storms with lightning, hail and fierce 160km/h updrafts.
Satellite data has already shown that storms were sending 160km/h winds straight into the Airbus's path at the time the pilot sent his last message at 11pm. The burst of automatic messages 10 minutes later recorded the deteriorating situation.
Investigators are baffled how a modern plane operated by three experienced pilots could fall out of the sky on a routine transatlantic flight.
One theory is that the jet was downed by a mid-air collision, possibly involving a military spy jet or an aircraft piloted by drug-runners. Another is that the jet was hit by lightning, causing a massive electrical short circuit.
But an unidentified senior long-haul Air France pilot told a French newspaper: "I have flown these jets for Air France for more than 10 years and the chances of an electrical fault seem unfeasible to me. There are five electricity supplies on the plane and they would all have to fail."
He said a bomb was the only logical reason the captain failed to send out a Mayday call.
French authorities insisted they were not ruling out any possible cause. But they played down the possibility of a terrorist attack, pointing out that no group has claimed responsibility for the disaster.
The Air France flight that was the subject of last Wednesday's bomb threat was delayed for hours while a search was carried out, but it landed uneventfully in Paris.
- This article was originally published on page 1 of The Star on June 04, 2009
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