AHMEDABAD: What caused an Air India Boeing 787-8 Dreamliner to crash, killing 260 people? Six months on, investigators have yet to provide clear answers, fueling disputes between pilots, the airline and the manufacturer.

As required by international law, India’s Aircraft Accident Investigation Bureau (AAIB) published a preliminary report one month after the June 12 disaster, when the plane exploded into flames shortly after takeoff from Ahmedabad in western India.

That report provided some technical information, but the investigation is still ongoing.

- What happened? -

Air India flight 171 took off at 1:38 p.m. from Ahmedabad airport with 230 passengers and 12 crew members on board, bound for London Gatwick Airport.