India’s accident investigators have released the transcript of the conversation between the two pilots of the Air India flight that crashed in June last year, killing 260 people, in the moments before the crash.

The Boeing 787 flight, which had taken off from Ahmedabad, India, bound for London, crashed shortly after take-off when the two engines were starved of fuel. The aircraft came down on a medical college near the airport. A total of 260 people — those on board and on the ground — were killed in the incident. Only one person on the flight survived.

The most striking detail to emerge from the released transcript was the exchange between the two pilots regarding the fuel cut-off. “Why did you cut off (the fuel supply)?” one pilot asked the other. In reply, the other pilot said, “I did not do it.” However, the transcript does not identify which pilot spoke which line. The pilot flying the aircraft was Clive Kunder. The monitoring pilot was senior captain Sumeet Sabharwal.

The Aircraft Accident Investigation Bureau (AAIB), India’s air accident investigation agency, said the investigation is now nearing completion, and that a draft of the final report is expected to be made public around October. The agency said it is currently examining technical issues and details of human actions, and that this work is not being carried out with the aim of reaching any predetermined conclusions.

However, Pushkar Raj Sabharwal, the father of Sumeet, said it was contrary to the facts for investigators to characterise the crash as having been caused by an error made by his son.