Investigators have confirmed a large piece of debris found on an African beach is from MH370, as aviation experts question the effectiveness of the Australian-led search.

On Thursday, Australian Transport Safety Bureau (ATSB) experts announced they were certain that a “flap” found off Tanzania in June was from the Boeing 777 that disappeared in March 2014 with 239 people on board.

But despite six pieces of MH370 debris washing up on Indian Ocean coastline since July 2015, the multi-million dollar search effort has turned in nothing. It will end in December should nothing be found.

Some aviation industry insiders claimed the ATSB-led search has been looking in the wrong places, while another expert told The New Daily that “there is no justification to continue the search”.

“Even if you found it, all it will do for you is give you the location it is sitting in through thousands of metres of water,” aviation expert Neil Hansford said.

“You’re not going to recover the blackbox, but even if you were it wouldn’t be usable. You will get no bodies, no DNA so it is actually taking you nowhere.”

Each recovered piece of MH370 has been found by people independent of the ATSB search.

Click on the image to enlarge the map.

Former pilot and MH370 commentator Desmond Ross claims the ATSB and Malaysian authorities have been searching in the wrong place from the start.

The MH370 search has focused on a large area in the southern Indian Ocean.

“I have never accepted the south Indian Ocean location as a viable crash site,” Mr Ross posted to his blog.

“My gut feeling, and experience, has, and will continue to tell me that the aircraft went down to the west of the Malaysian mainland without proper control of a human pilot.

“People seem to have forgotten the reports of eyewitnesses on an oil rig and on a yacht, seeing a flaming object in the night sky, on that night, in the area to the west of Malaysia.

The Rolls Royce logo on debris found in March.

“But the scientific theory could not allow these reports to be correct and they were discarded.”

He went on to write that the parts of MH370 that have been found could still have ended up where they were located from a crash west of Malaysia.

On Monday, more debris – which looked to have been affected by fire – was found off Madagascar and handed to the ATSB.

It has not been examined and thus it is not known for certain if it’s from MH370.

ATSB says search isn’t misdirected

An ATSB statement to The New Daily was adamant the search had been conducted in the correct place.

MH370 has been missing since March 2014. Photo: Getty

“We are searching the area of seafloor which all of the available evidence and analysis is indicating has the highest probability of containing the aircraft,” the ATSB wrote.

Mr Hansford backed the ATSB’s search area.

“Where the debris coming up is exactly where researchers said they would, given where the plane is thought to be,” he said.