SAINT-DENIS, Reunion, July 30 (Reuters) - Plane debris washed up on the French island of Reunion in the Indian Ocean is almost certainly part of a Boeing 777, a Malaysian official and aviation experts said, potentially providing some answers for families of those aboard last year's vanished flight MH370.
Malaysian investigators are due in Reunion on Friday and the object, identified by numerous aviation experts as part of a wing, is then due to be sent to a French military laboratory near Toulouse for checks, French police sources said.
National carrier Malaysia Airlines was operating a Boeing 777 on the ill-fated flight, which disappeared in March last year en route from Kuala Lumpur to Beijing in one of the most baffling mysteries in aviation history. It was carrying 239 passengers and crew.
The debris was found on Wednesday washed up on Reunion, a volcanic island of 850,000 people that is a full part of France known as an "overseas department," located in the Indian Ocean near Africa.
It is roughly 3,700 km (2,300 miles) away from the broad expanse of the southern Indian Ocean off Australia, where search efforts have focused, but Malaysian Prime Minister Najib Razak said currents could have carried wreckage that way.
"The location is consistent with the drift analysis provided to the Malaysian investigation team, which showed a route from the southern Indian Ocean to Africa."
Aviation experts who have seen widely circulated pictures of the debris said it may be a moving wing surface known as a flaperon, situated close to the fuselage.
"It is almost certain that the flaperon is from a Boeing 777 aircraft. Our chief investigator here told me this," Malaysian Deputy Transport Minister Abdul Aziz Kaprawi told Reuters.
There have been four serious accidents involving 777s in the 20 years since the widebody jet came into service. Only MH370 is thought to have crashed south of the equator.
"No hypothesis can be ruled out, including that it would come from a Boeing 777," the Reunion prefecture and the French Justice Ministry said in a joint statement.
PART OF WING?
Aviation experts who have seen widely circulated pictures of the debris said it may be a moving wing surface known as a flaperon, situated close to the fuselage.
"It is almost certain that the flaperon is from a Boeing 777 aircraft. Our chief investigator here told me this," Malaysian Deputy Transport Minister Abdul Aziz Kaprawi told Reuters.
Abdul Aziz said a Malaysian team was heading to Reunion Island, about 600 km (370 miles) east of Madagascar.
Australia's Deputy Prime Minister Warren Truss said the object had a number stamped on it that might speed its verification.
"This kind of work is obviously going to take some time although the number may help to identify the aircraft parts, assuming that's what they are, much more quickly than might otherwise be the case," he said.
Investigators believe someone deliberately switched off MH370's transponder before diverting it thousands of miles off course. Most of the passengers were Chinese, and Beijing said it was following developments closely.
For the families of those on board, lingering uncertainty surrounding the fate of the plane has been agony.
"Even if we find out that this piece of debris belongs to MH370, there is no way to prove that our people were with that plane," said Jiang Hui, 41, whose father was on the flight.
Zhang Qihuai, a lawyer representing some of the passengers' families, said a group of around 30 relatives had agreed they would proceed with a lawsuit against the airline if the debris was confirmed to be from MH370.
OCEAN CURRENTS
The plane piece is roughly 2-2.5 meters (6.5-8 ft) in length, according to photographs. It appeared fairly intact and did not have visible burn marks or signs of impact. Flaperons help pilots control an aircraft while in flight.
Greg Feith, an aviation safety consultant and former crash investigator at the U.S. National Transportation Safety Board (NTSB), said his sources at Boeing had told him the piece was from a 777. Whether it was MH370 was not clear, he said.
"But we haven't lost any other 777s in that part of the world," Feith said.
Oceanographers said vast, rotating currents sweeping the southern Indian Ocean could have deposited wreckage from MH370 thousands of kilometers from where the plane is thought to have crashed.
If confirmed to be from MH370, experts will try to retrace the debris drift back to where it could have come from. But they caution that the discovery was unlikely to provide any more precise information about the aircraft's final resting place.
"This wreckage has been in the water, if it is MH370, for well over a year so it could have moved so far that it's not going to be that helpful in pinpointing precisely where the aircraft is," Australia's Truss told reporters.
Robin Robertson, an oceanographer at the University of New South Wales in Sydney, said the timing and location of the debris made it "very plausible" that it came from MH370, given what was known about Indian Ocean currents.
Malaysia Airlines said it was too early to speculate on the origin of the debris.
The Australian Transport Safety Bureau (ATSB) said it was working with Boeing and other officials.
Boeing declined to comment on the photos, referring questions to investigators.
Aviation consultant Feith said that if the part was from MH370, the bulk of the plane likely sank, while the flaperon had air pockets that allowed it to float below the water's surface.
Finding the wreckage would involve reverse engineering the ocean currents over 18 months, Feith said. "It's going to take a lot of math and science to figure that out," he said.
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