Before the flight, they exterminated the test without fail, so the US military reasonably suggested that the fuselage element was lost in the air. Missing parts found after landing the F-35.
“The incident occurred on November 30 2017 during a training flight a hundred kilometers east of Okinawa, at the same time Japanese media wrote about it, in particular, the Nippon News Network,” but the US military leadership acknowledged the fact that December 4 only happened.
Earlier it was reported that the US Air Force over the past few months recorded a "significant surge in" physiological episodes "(cases of inexplicable deterioration in the health of pilots) accompanying the operation of F-35 fighters."
Recall, the F-35 Lightning II is a family of 5-generation multi-purpose fighters, which the American company Lockheed Martin has been developing and releasing since 2001. The machine is available in 3-x options: A (normal for the Air Force), B (with a short takeoff and vertical landing) and C (deck).