The cause of the Air India Boeing 787 crash in Ahmedabad, India, has been determined. Nearly 300 people were killed in the horrific accident. On June 12, the plane crashed into a medical college dormitory, killing many people there. On the other hand, all but one of the 242 passengers on board the plane lost their lives.

India's Air Accidents Investigation Bureau said in its initial report that the plane's fuel supply switch had been turned off moments before the crash, preventing fuel from flowing to the engine.

Investigators were able to extract this information from the plane's black box.

They said the plane's two fuel supply switches went from run to cut off in less than a second. The plane's speed reached 180 knots at the time.

Audio recovered from the black box shows one pilot asking the other why he had turned off the fuel supply switch. The other pilot then said he had not turned off the switch.

Then the switches were turned back on. At that time, fuel began to flow to the engines. But within seconds, the plane crashed. Before that, the emergency system was also activated to keep the engines running.

The fuel supply switch on the Boeing 787 is known as the cutoff. It is located between the two pilot seats and below the throttle lever. It is protected by a metal bar and has a locking system to prevent it from being accidentally closed.

Investigators found evidence that the plane had no problems taking off and that the fuel it was carrying was of good quality.