A US Navy rescue team waded through a half-submerged Air Niugini plane to pull survivors into an inflatable rescue boat after the jet crashed into a Micronesian lagoon.

Key points: The Navy team was among a host of small boats to rush to the passengers' rescue

The Navy team was among a host of small boats to rush to the passengers' rescue Officials said seven people had been taken to the hospital after the crash

Officials said seven people had been taken to the hospital after the crash On Saturday, Air Niugini said in a statement that one male passenger was missing

Footage released by the Navy shows the team speeding towards the downed Boeing 737-800, which slammed into the water after missing the runway at Chuuk International Airport on September 28.

The team had been in the area working on improving the wharf in Chuuk.

Lifejacket-clad men and women started emerging from the cabin soon after the small boat glided to a stop over one water-covered wing.

Someone from the jet told the team a man needed urgent help on the opposite side of the craft.

"There's a badly injured guy on the other side," one man said, relaying the message to an another vessel approaching the sinking plane.

The Navy crew turned their attention to transferring the soaked passengers and crew to their boat.

"Careful because I don't know how deep this is," one man said as the camera moves inside the half-sunk plane, the team sloshing past rows of seats submerged up to the armrests.

The men compared headcounts of passengers and crew originally on the plane, and the number who boarded a host of small boats that also raced to the rescue.

A man warns rescuers to take care in the sinking plane. ( ABC News )

The men spoke in urgent tones, after one warned the plane would soon be filled with jet fuel.

With the plane apparently cleared, the team returned to the boat.

"They got everybody," a man said.

However, in a statement on Monday evening, Air Niugini CEO Tahawar Durrani said divers had discovered the body of a male passenger during a further search of the downed jet and the surrounding area in the lagoon.

"Our outreach team is in touch with the man's family and we are making arrangements to repatriate his body," Mr Durrani said.

Of the remaining 35 passengers and 11 crew that have been accounted for, seven were taken to hospital after the crash.

ABC/wires