A panel (1 m x 0.6 m, 4.3 kg) of the right wing trailing edge fell off from a Boeing 777-200ER of KLM operated as flight KL/KLM868 from Osaka/Kansai, Japan to Amsterdam/Schiphol, the Netherlands at 2400 m (about 8000 feet) of altitude over Osaka prefecture, Japan.
The panel hit the roof of a driving car, made a dent on the roof and cracked a rear window of the car. Neither of two occupants of the car nor 321 occupants of Boeing was injured. The flight has reached to the destination without further trouble. JTSB launched an investigation as a serious incident.
Story
https://aviation-safety.net/wikibase/wiki.php?id=199928
https://twitter.com/harro/status/911853848154820609