By ROD McGUIRK
CANBERRA, Australia (AP) — The search for an Australian army helicopter that crashed at sea killing four people during a military exercise with the United States has found human remains but not the black box crucial to explaining the tragedy. Recovering the four air crew and the black box flight data recorder have been the main priorities since an MRH-90 Taipan helicopter crashed on July 28 during a nighttime operation in the Whitsunday Islands off the northeast Australian coast. Army Lt.-Gen. Greg Bilton said on Thursday an underwater drone spotted human remains and part of the cockpit. The Australian navy will soon deploy specialized equipment to retrieve the wreckage and remains.