The quest for Air Asia flight QZ8510, which crashed in the Sea on Sunday, is expected to move underwater, with the entry of specialized equipment.

A French crash investigation team will utilize delicate acoustic identification gadgets to attempt to locate the plane's "black box" flight recorder.

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Authorities have said the plane was going at 32,000ft (9,750m) when it asked to move to 38,000ft to keep away from awful climate.

At the point when air traffic controllers assented to permit it to move to 34,000ft a couple of minutes after that they got no answer.

A source cited by Reuters said that radar information seemed to demonstrate that the airplane's "unbelievably" steep climb may have been beyond the Airbus A320's limits.

The anonymous source underlined that more data was required before a conclusive conclusion could be arrived at.

The Airbus A320-200 was flying from Surabaya in Indonesia to Singapore with 137 adult passengers, 17 children and one infant, along with two pilots and five crew, on the plane. The majority of those on board were Indonesians.

No survivors have been discovered and the reason for the accident stays obscure and A few more bodies were recovered on Friday, bringing the aggregate found to 16.

A few bits of flotsam have been recouped, including what is thought to be a piece of a wing flap.

The BBC's Rupert Wingfield-Hayes in Pangkalan Bun on the Borneo coast - the closest town to the suspected accident site - said there is a becoming sense among search groups that their errand is going to be harder than at first suspected.

Bad weather and churning seas have dashed hopes of finding the plane visually, he says, and teams will now be relying on the sonar and listening equipment to scan the sea floor.

Spotting the fuselage and the flight recorder will help answer the secret of what happened to make the plane tumble from the sky.

The leader of Indonesia's inquiry and salvage office, Bambang Soelistyo, said on Friday that wreckage and bodies are spread over a 5km area of the Java Sea.

The inquiry was currently focusing on a territory of 1,575 nautical square miles of the Java Sea off Borneo, he told journalists.

He further said that Divers are already on standby at the navy ship Banda Aceh to dive on that priority area to locate the body of the plane, and he hoped that will get a significant result today.

TagsRupert Wingfield-Hayes, Borneo coast, Bambang Soelistyo, Java Sea