The messages detail a series of failures that end with its systems shutting down, suggesting the plane broke apart in the sky, according to an aviation industry official with knowledge of the investigation who spoke on condition of anonymity because he was not authorized to discuss the crash
France's accident investigation agency said only two findings have been established so far: One is that the series of automatic messages sent from Flight 447 gave conflicting signals about the plane's speed; the other is that the flight path went through dangerously stormy weather
The last message from the pilot was a manual signal at 11 p.m. local time Sunday saying he was flying through an area of black, electrically charged cumulonimbus clouds that come with violent winds and lightning. The automated messages that followed suggest the plane broke apart in the sky, according to the aviation industry official.
At 11:10 p.m., a cascade of problems began: the autopilot had disengaged, a key computer system switched to alternative power, and controls needed to keep the plane stable had been damaged. An alarm sounded indicating the deterioration of flight systems. Then, systems for monitoring air speed, altitude and direction failed. Then controls over the main flight computer and wing spoilers failed as well. At 11:14 p.m., a final automatic message signaled loss of cabin pressure and complete electrical failure as the plane was breaking apart.
Patrick Smith, a U.S. airline pilot and aviation analyst, said the failures could have begun with a loss of electrical power, possibly as the result of an extremely strong lightning bolt.
"What jumps out at me is the reported failure of both the primary and standby instruments," Smith said. "From that point the plane basically becomes unflyable."
"If they lost control and started spiraling down into a storm cell, the plane would begin disintegrating, the engines and wings would start coming off, the cabin would begin falling apart," he said.
The pilot of a Spanish airliner flying nearby at the time reported seeing a bright flash of white light plunging to the ocean, said Angel del Rio, spokesman for the Spanish airline Air Comet.
"Suddenly, off in the distance, we observed a strong and bright flash of white light that took a downward and vertical trajectory and vanished in six seconds," the pilot wrote in his report, del Rio told the AP. The pilot of the Spanish plane, en route from Lima, Peru to Madrid, said he heard no emergency calls.