Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane crash that left at least 270 people dead.

All but one of the 242 passengers and crew on board Air India Flight AI171 died after the Boeing Co. 787 Dreamliner crashed shortly after takeoff on Thursday, making 2025 one of the deadliest years in the past decade for civil aviation.

Fatal crash raises new concerns for both firms as they try to revamp after years of problems that marred reputations.