Story highlights
- American Blaine Gibson is leading a search for missing MH370
- He found debris on Madagascar that may have come from the plane
Gibson said one piece he found might prove why the plane crashed.
"If the third piece, the monitor case, is confirmed to be from MH 370, it proves, tragically, that the main body of the cabin broke apart in a forceful impact ... (and) definitely not a controlled ditching," he said. "The barnacles on board will hopefully provide some clues as to the location of the crash site and route followed."
Gibson found the debris in June on the island of Nosy Boraha, off the east coast of Madagascar.
MH370's disappearance is one of the world's biggest aviation mysteries.
The plane vanished from radar while en route from Kuala Lumpur, Malaysia, to Beijing, with 239 people on board, on March 8, 2014.
Australian investigators later said it "almost certainly" came from MH370.
Meanwhile, the Chinese search and rescue vessel looking for the missing plane has wrapped up its mission in the Indian Ocean, according to the ATSB.
In July, the governments of Malaysia, Australia and China agreed the search for MH370 will be suspended if no evidence of the plane is found upon the completion of the search area.