Amelia Earhart. Photo / AP
Ric Gillespie, director of the International Group for Historic Aircraft Recovery, hopes this can now be linked to a sheet of aluminium that his group recovered in 1991 from Gardner Island, which is in the same area of ocean where Earhart disappeared and has been the focus of previous search operations.
"If the enhancement of the photograph is good enough to establish that the rivet patterns on the repair match those on the wreckage, then that is conclusive proof that she ended on the island and was not lost at sea," he said.
The breakthrough would help solve the most disputed mystery in aviation before this year's disappearance of Malaysia Airlines flight MH370.
Earhart disappeared in early July 1937 after a radio antenna ripped away from the Electra as she took off from Papua New Guinea, en route to Howland Island south of Hawaii, more than 4,000 kilometres away.
US Coast Guard heard her issue distress messages 19 hours later as he she flew over water, apparently lost and desperately searching for land. Nothing more was heard.
Gardner Island was first the focus of attention in 1960 when an ex-marine told a San Diego newspaper about his trip there with US forces in 1946. A tribesman told him that a skeleton and woman's shoe had been found in 1938.
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