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Saint-Andre, Reunion • A barnacle-encrusted wing part that washed up on a remote Indian Ocean island could help solve one of aviation's greatest mysteries as investigators work to connect it to the Malaysia Airlines flight that vanished more than a year ago.
The surprise discovery of the debris on a rocky beach stirred hopes and emotion among families of the missing, after a year and a half of grieving and frustration at a lack of answers, despite a wide, deep and expensive multinational search effort in the southern Indian Ocean, the China Sea and the Gulf of Thailand.
Even if it is confirmed to be a long-awaited first clue to the disappearance of Flight 370, there's no guarantee that investigators can still find the plane's recorders or other remains a year and a half later.
The coming hours and days will be crucial. French authorities moved the plane piece from the beach to the local airport on Reunion, and will send it next to the city of Toulouse, where it may arrive Saturday morning, according to the Paris prosecutor's office.
Toulouse is the hub of Europe's aerospace industry, with the headquarters of Airbus and a network of hangars and plane facilities. The plane part will be analyzed in special defense facilities used for airplane testing and analysis, according to the Defense Ministry.
Air safety investigators, including one from Boeing, have identified the component found on the French island of Reunion as a "flaperon" from the trailing edge of a Boeing 777 wing, a U.S. official said. The official wasn't authorized to be publicly named.
Flight 370, which disappeared March 8, 2014, with 239 people on board, is the only 777 known to be missing. The unsuccessful search for the plane has raised concerns worldwide about whether airliners should be required to transmit their locations continually via satellite, especially when flying long distances over the ocean.
"It's the first real evidence that there is a possibility that a part of the aircraft may have been found," said Australian Transport Minister Warren Truss, whose country is leading the search for the plane in a remote patch of ocean far off Australia's west coast.
A French law enforcement helicopter is scouring the waters around the island in hopes of spotting more debris, and U.S. investigators are examining a photo of the debris.
The wing part was found on a desolate, rocky beach in the small town of Saint-Andre and was transferred to the civil aviation authority's offices in the island's main airport, a local police official said.
Flaperons are located on the rear edge of both wings, about midway between the fuselage and the tips. When the plane is banking, the flaperon on one wing tilts up and the other tilts down, which makes the plane roll to the left or right as it turns.
The piece could help investigators figure out how the plane crashed, but whether it will help search crews pinpoint the rest of the wreckage is unclear, given the complexity of the currents in the southern Indian Ocean and the time that has elapsed since the plane disappeared.
The last primary radar contact with Flight 370 placed its position over the Andaman Sea about 370 kilometers (230 miles) northwest of the Malaysian city of Penang. Reunion is about 5,600 kilometers (3,500 miles) southwest of Penang, and about 4,200 kilometers (2,600 miles) west of the current search area.
It was well understood after the aircraft disappeared that if there was any floating debris from the plane, Indian Ocean currents would eventually bring it to the east coast of Africa, said aviation safety expert John Goglia, a former member of the U.S. National Transportation Safety Board. But the debris is unlikely to provide much help in tracing the ocean currents back to the location of the main wreckage, he said.
"It's going to be hard to say with any certainty where the source of this was," he said. "It just confirms that the airplane is in the water and hasn't been hijacked to some remote place and is waiting to be used for some other purpose. ... We haven't lost any 777s anywhere else."
The discovery is unlikely to alter the seabed search, said Australian Transport Safety Bureau Chief Commissioner Martin Dolan, who is heading up the hunt. Dolan said search resources would be better spent continuing the seabed search with sonar and video for wreckage rather than reviving a surface search for debris if the part proved to be from Flight 370.
There is precedence for large objects traveling vast distances across the Indian Ocean. Last year, a man lost his boat off the Western Australia coast after it overturned in rough seas. Eight months later, the boat turned up off the French island of Mayotte, west of Madagascar — 7,400 kilometers (4,600 miles) from where it disappeared.
If the part belongs to Flight 370, it could provide valuable clues to investigators trying to figure out what caused the aircraft to vanish in the first place, said Jason Middleton, an aviation professor at the University of New South Wales in Sydney. The nature of the damage to the debris could help indicate whether the plane broke up in the air or when it hit the water, and how violently it did so, he said.
The barnacles attached to the part could also help marine biologists determine roughly how long it has been in the water, he said.
But the sister of a Flight 370 passenger says she is skeptical of the new find.
"It has been more than one year, and now they claim to have found debris of MH370 on an island? We don't accept this. We do not believe what they claim. The finding does not constitute anything," Dai Shuqin told The Associated Press. Her sister Dai Shuling and five members of her family were on the plane.
Over the past 16 months, hopes have repeatedly been raised and then dashed that the plane, or parts of the plane, had been found. In the end, none of them were from Flight 370.