Osprey crash was caused by pilot's decision to keep flying with cracks in a gear
NPROsprey crash was caused by pilot's decision to keep flying with cracks in a gear toggle caption Japan Coast Guard/via AP WASHINGTON — A deadly Osprey aircraft crash last November off Japan was caused by cracks in a metal gear and the pilot's decision to keep flying rather than heed multiple warnings that he should land, according to an Air Force investigation released Thursday. But a Pentagon program office in charge of the V-22 Ospreys knew that "total loss of aircraft and crew were possible" if those proprotor gearbox components failed, lead investigator Lt. Gen. Michael Conley told reporters Wednesday before the report's official release. Five minutes after the first vibration, a left proprotor gearbox chip burn warning posted in the cockpit. At least one piece wedged into the teeth of the larger transmission gearing system, jamming and breaking off gearing teeth until the left proprotor gearbox could no longer turn the Osprey's left proprotor mast.
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