Tokyo, June 10: It is highly likely that the Japanese F-35 stealth fighter jet crashed into the Pacific Ocean because the pilot lost "spatial awareness", officials said according to a BBC News report.
In April, the Lockheed Martin aircraft disappeared from radar screen during an exercise. Debris was later found and last week the remains of the 41-year-old pilot was discovered.
Officials said there was no fault with the remaining fleet of aircraft.
"It seems highly likely that the pilot was suffering from vertigo and was unaware of his condition," the Japan Air Self Defense Force (JASDF) said in a press release.
The plane, which was less than a year old, crashed 28 minutes after taking off from Misawa air base in Aomori prefecture. Officials believe the aircraft came down at a speed of about 1,100km/h (683mph). The pilot gave no indication that he was in trouble and there is no evidence he tried to eject his seat. The Air Force has not recovered any intact data from flight data recorders.