The June 12 crash claimed the lives of at least 260 individuals and took place in India’s western Ahmedabad city when the aircraft collided with a residential area shortly after its departure.
NEW DELHI, Delhi — According to a preliminary investigation report released early Saturday, the fuel control switches for the engines of an Air India flight that crashed last month were adjusted from the “run” to the “cutoff” setting moments before the crash, depriving both engines of fuel.
The report, published by India’s Aircraft Accident Investigation Bureau, further revealed that both pilots were perplexed by the alteration in the switch setting, which led to a reduction in engine thrust soon after takeoff.
The Air India flight — a Boeing 787-8 Dreamliner — crashed on June 12 and killed at least 260 people, including 19 on the ground, in the northwestern city of Ahmedabad. Only one passenger survived the crash, which is one of India’s worst aviation disasters.
The plane was carrying 230 passengers — 169 Indians, 53 British, seven Portuguese and a Canadian — along with 12 crew members.
According to the report, the flight lasted around 30 seconds between takeoff and crash. It said that once the aircraft achieved its top recorded speed, “the Engine 1 and Engine 2 fuel cutoff switches transitioned from RUN to CUTOFF position one after another” within a second. The report did not say how the switches could have flipped to the cutoff position during the flight.
The movement of the fuel control switches allow and cut fuel flow to the plane’s engines.
The switches were flipped back into the run position, the report said, but the plane could not gain power quickly enough to stop its descent after the aircraft had begun to lose altitude.
“One of the pilots transmitted “‘MAYDAY MAYDAY MAYDAY’,” the report said.
It also indicated confusion in the cockpit moments before the crash.
In the flight’s final moment, one pilot was heard on the cockpit voice recorder asking the other why he cut off the fuel. “The other pilot responded that he did not do so,” the report said.
The preliminary report did not recommend any actions to the Boeing.
Air India in a statement said it is fully cooperating with authorities investigating the crash.
“Air India is working closely with stakeholders, including regulators. We continue to fully cooperate with the AAIB and other authorities as their investigation progresses,” it said.
The plane’s black boxes — combined cockpit voice recorders and flight data recorders — were recovered in the days following the crash and later downloaded in India.
Indian authorities had also ordered deeper checks of Air India’s entire fleet of Boeing 787 Dreamliner to prevent future incidents. Air India has 33 Dreamliners in its fleet.
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