Searching for the missing Air France jet

Searching for the missing Air France jet

Military planes and ships located more debris from an Air France jet today, but high seas and heavy winds were slowing the recovery effort and delaying the arrival of crucial deep-water submersibles.

Search vessels from several nations pushed toward the floating debris, including a 23-foot chunk of plane and a 12-mile-long oil slick that Brazilian pilots spotted from the air. Rescuers have still found no signs of life from the plane that was carrying 228 people from Rio de Janeiro to Paris, Air Force spokesman Col. Jorge Amaral said.

Flight 447 disappeared minutes after flying into an extremely dangerous band of storms Sunday night, but what exactly caused its electrical systems and cabin pressure to fail remains a mystery. The "black box" cockpit recorders could be miles below the surface of the Atlantic Ocean.

If they can't be recovered, investigators will have to focus on maintenance records and a burst of messages sent by the plane just before it disappeared. Officials have released some details of these messages, but a more complete chronology was published today by Brazil's O Estado de S. Paulo newspaper, citing an unidentified Air France source.

Air France and Brazilian military officials refused to confirm the report. But if accurate, it suggests that Flight 447 may have broken up thousands of feet in the air as it passed through a violent storm, experts told The Associated Press.

The report said the pilot sent a manual signal at 11 p.m. local time saying he was flying through an area of "CBs" -- black, electrically charged cumulo-nimbus clouds that come with violent winds and lightning. Satellite data has shown that towering thunderheads were sending 100 mph winds straight into the jet's flight path at that time.

Ten minutes later, the plane sent a burst of automatic messages, indicating the autopilot had disengaged, the "fly-by-wire" computer system had been switched to alternative power, and controls needed to keep the plane stable had been damaged. An alarm also sounded, indicating the deterioration of flight systems, according to the report.

Three minutes after that, more automatic messages indicated the failure of two other fundamental systems pilots use to monitor air speed, altitude and direction. Then, a cascade of other electrical failures in systems that control the main flight computer and wing spoilers.

The report repeats a detail previously released by Brazil's Air Force: that the last message came at 11:14 pm, indicating loss of air pressure and electrical failure. The newspaper said this could mean sudden de-pressurization, or that the plane was already plunging into the ocean.

Air France spokesman Nicolas Petteau referring questions about the report to the French accident investigation agency, BEA, whose spokesman Martine Del Bono said the agency won't comment.

Brazil's Defense Minister Nelson Jobim also declined to comment on the report, saying "that investigation is being done by France, Brazil's only responsibility is to find and pick up the pieces."

France's defense minister and the Pentagon have said there were no signs that terrorism was involved, and Jobim said "that possibility hasn't even been considered."

The fierce thunderstorms, turbulence, lightning or a catastrophic combination of events could have broken apart the plane, aviation experts have said. And while the messages reported by the newspaper don't indicate why the aircraft went down, they strongly suggest it broke apart in the air, said Bill Voss, president and CEO of the Flight Safety Foundation in Alexandria, Va.

"These are telling us the story of the crash. They are not explaining what happened to cause the crash," Voss said. "This is the documentation of the seconds when control was lost and the aircraft started to break up in air."

Voss stressed that the messages alone were not enough to understand why the Air France jet went down, noting that the black boxes will have "far more parameters" that could determine the cause.

The new debris was discovered about 90 kilometers (55 miles) south of where searchers a day earlier found an airplane seat, a fuel slick, an orange life vest and pieces of white debris. The original debris was found roughly 400 miles northeast of the Fernando de Noronha islands off Brazil's northern coast, an area where the ocean floor drops as low as 22,950 feet below sea level.

Brazil was leading the search, while France took charge of the crash investigation, sending experts to Rio to work with Air France, Airbus and meteorologists to determine what happened.

And while four boats and a tanker ship were en route to the scene, they were slowed by high seas. "We have four divers on the way, but the first of them will not get to the scene until midday Thursday," a Brazilian navy spokeswoman said today, speaking on condition of anonymity.

Brazil lacks the equipment needed to reach the ocean floor, she added, so if the black boxes are at the bottom of the sea, their recovery will have to wait for the arrival at week's end of a French research ship with remotely controlled submersibles. The unmanned submarines can explore as deeply as 19,600 feet, but that ship and another French military ship are still days away, French military spokesman Christophe Prazuck said.