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Navy divers have recovered personal items belonging to the crew onboard a crashed military helicopter.
The Defence department said the items and further wreckage from the MRH-90 Taipan which crashed off the Queensland coast last month during Exercise Talisman Sabre, had been found despite challenging conditions.
Captain Danniel Lyon, Lieutenant Maxwell Nugent, Warrant Officer Class Two Joseph Laycock and Corporal Alexander Naggs were killed in the crash.
"The recovery operation has been conducted in an exceptionally challenging environment and has reached the point of requiring specialist equipment not available within the Australian Defence Force," the department said in a statement on Friday.
Defence will hire a private contractor to help finish the recovery operation, expecting the work to start on Tuesday.
The contractor will work with the ADF, the Queensland Police Service and Defence Flight Safety Bureau investigations.
The voice and flight data recorder was found earlier in August.