Investigators are probing an apparent uncontained engine failure involving a Thai Airways International Boeing 777-300ER during departure from Bangkok.
The aircraft had been operating flight TG970 to Zurich, from runway 01L, at about 01:30 on 20 October.
Thai says the aircraft had been rolling for take-off when the left-hand General Electric GE90 powerplant failed, prompting the crew to abort the departure.
The aircraft – provisionally identified as HS-TKL, a 2012 airframe – had been transporting 339 passengers and 20 crew members.
Images circulating on social media, purportedly showing the aircraft's engine but unverified by FlightGlobal, indicate substantial damage to the powerplant's aft right-hand side.
Thai says the 777 needed to undergo repair and the passengers had to be accommodated overnight owing to the lack of a spare aircraft.