Two aircraft fragments found on the beaches of South Africa and Mauritius are all but confirmed to be from missing Malaysia Airlines flight MH370.

A piece of engine cowling featuring a Rolls-Royce stencil, which was found in South Africa earlier this year, is “almost certainly” from the Boeing 777 that went missing more than two years ago with 239 people on board, the Australian Transport Safety Bureau said on Thursday.

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The second piece found on March 30 in Mauritius – eight days after the engine cowling – is “almost certainly” a panel segment from MH370’s main cabin.

A panel used to control drag on an aircraft was found in South Africa. Photo: AAP

This latest find comes after a wing part recovered last year from La Reunion island, which neighbours Mauritius, was confirmed as also coming from the lost jet.

The ‘cowling’ – otherwise known as an engine cover – was found in Mossel Bay in South Africa.

Investigators were able to link the cowling to MH370 using the Rolls Royce stencil visible on it, despite there being no other unique identifiers.

The panel, a decorative part of a ‘work table’ in the main cabin, was identified as belonging to only Malaysian Airlines aircraft.

The The Australian Transport Safety Bureau released a statement all but confirming the pieces as belonging to the flight.

“The results from these tests will be provided to the Malaysian investigation team once complete. In terms of the identification of the two items of debris, it was concluded that:

“Part No. 3 was a Malaysian Airlines Boeing 777 engine cowling segment, almost certainly from the aircraft registered 9M-MRO.

“Part No. 4 was a Malaysian Airlines Boeing 777 panel segment from the main cabin, associated with the Door R1 closet, almost certainly from the aircraft registered 9M-MRO.”

Flight MH370 went down between Kuala Lumpur and Beijing on March 8, 2014, presumably killing all 239 passengers and crew.

Australia is leading the search for aircraft, having covered 109,000 square kilometres of sea already.

It is likely the search will be abandoned if nothing is found at 120,000 kilometres.