Japan Osprey crash caused by cracks in a gear and pilots decision to keep flying, Air Force says WPXI [Video]

WASHINGTON — (AP) — 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, instead of heeding multiple warnings that he should land, according to an Air Force investigation released Thursday.

The CV-22B Osprey crash killed eight Air Force Special Operations Command service members and led to a monthslong military-wide grounding of the fleet. It’s among four fatal Osprey crashes in the last two years driving investigations into the Osprey’s safety record. It’s created a split among the services about the future role of the unique aircraft, which can fly like an airplane but land like a helicopter.

For months, the Air Force would only say an unprecedented component failure caused the crash. On Thursday, it identified that a toothed piece called a pinion gear — a critical part of the proprotor gearbox — was to blame. The proprotor gearbox serves …