The entire Osprey fleet has been grounded in the US. This decision comes after a fatal crash occurred in Japan

The US has grounded all of its V-22 Osprey helicopters following a report that attributed last week's crash off the coast of Japan, which resulted in the death of eight crew members, to a malfunction. In a move to reduce risk during the ongoing investigation, Air Force and Navy officials decided to suspend operations of the fleet. Recovery efforts for the remains of the service members killed in the crash are still underway. Following the incident, Japan also took the precautionary measure of grounding its fleet of 14 Ospreys. As the only other country known to operate Ospreys, which function as both helicopters and propeller-powered aircraft, Japan's decision mirrored that of the US. The Air Force stated that the grounding of the American fleet would continue until the investigation was concluded, without providing an estimated duration. In a statement released on Wednesday, Air Force Special Operations Command explained that the stand-down period will allow for a thorough investigation to determine the causes of the crash and provide recommendations for the safe resumption of flight operations for the CV-22 fleet. During the crash, the Osprey was engaged in a training flight from a US Marine Corps air base in Yamaguchi Prefecture en route to Kadena Air Base in Okinawa. Witnesses reported that the aircraft flipped over and caught fire before crashing into the sea.