Hurlburt Field , Florida ( CNN ) -- An Air Force CV-22 Osprey crashed Wednesday during a routine training mission north of Navarre , Florida , injuring five crew members aboard , a military official said . The crash occurred about 6:45 p.m. at Hurlburt Field 's Eglin Range , said Amy Nicholson , chief of public affairs at the airfield . The five injured crew members were taken to an area hospital , Nicholson said . The extent of their injuries was not immediately known . The cause of the accident is under investigation , she said . The Osprey was assigned to the 1st Special Operations Wing , the Air Force said . The tilt-rotor aircraft can fly like an airplane and land like a helicopter . The Army began developing the Osprey in 1982 , though the program was nearly scrapped in 1989 when then-Secretary of Defense Dick Cheney sought to cancel it because of ballooning costs . Questions were raised about the safety of the Osprey after two crashes , including one in 1992 at a Marine Corps air base in Virginia that killed the crew . In late 2000 , the Marine Corps grounded the Osprey fleet after two crashes -- one in Arizona that killed four crew members and 15 passengers , and another in North Carolina that killed the crew . A redesign was ordered on the Osprey , and it resumed flights in 2002 . The Air Force began using Ospreys in 2008 after testing the aircraft in 2006 . They were first deployed by the Marines in Iraq in 2007 after 18 years and $ 20 billion in development . 'Conclusive evidence ' that F-22 pilot over Alaska did not survive training mission crash . CNN 's Mike Mount contributed to this report .
NEW : Development of the Osprey was nearly scrapped in 1989 . A CV-22 Osprey crashed at Hurlburt Field 's Eglin Range , the Air Force says . Five crew members are injured , a spokeswoman says . The crash is blamed on pilot error and poor weather conditions.