From 787 wikipedia page: "On June 12, 2025, Air India Flight 171, an 11-year-old Boeing 787-8 registered as VT-ANB[398] operating from Ahmedabad Airport to London Gatwick Airport, crashed into the hostel building of B. J. Medical College shortly after takeoff. According to the preliminary Aircraft Accident Investigation Bureau report released on July 8, 2025, the crash was caused by both engines shutting down after their fuel control switches moved from the "RUN" to "CUTOFF" position.[399]: 13–14 The cause of the switch movement remains under investigation. The report did not recommend any actions to Boeing, or 787 operators.[400][399]: 15 All but one of the 242 people on board were killed, as well as 19 people on the ground.[401] The sole survivor was a British national "

That has not been determined to have been an engineering defect.