The Aircraft Accident Investigation Bureau has issued a 15-page preliminary report of the Air India crash in Ahmedabad on June 12.

The report examines the sequence of events and the performance of the engines prior to the crash of a Boeing 787-8 plane and offers the official first explanation of what occurred.

At 13:38:42 IST or 08:08:42 UTC, the aircraft was flying at a speed of 180 knots and immediately after that, both the engines' fuel cutoff switches moved from the Run position to the Cutoff position.

Within a matter of seconds, the fuel switches for both engines were moved back to the Run position, and the increase in exhaust gas temperature for both engines indicated that attempts were made to light up both of them.

Cockpit voice recording recorded one pilot saying, "Why did you cut off?" and another saying, "I did not do so," which indicated potential miscommunication.

Flight data established that both engines experienced a low N2 value that fell below the level of minimum idle during the incident.

Engine 1 indicated recovery as its core speed decline halted, then reversed and began moving towards recovery after an initial failure.

Engine 2, even though it did relight, failed to arrest the deceleration of its core speed even after multiple attempts at resumption of fuel supply.

The engine and flight recorder data indicated that exhaust gas temperatures rose in both engines following the return of the switches to Run, meaning that combustion had taken place during the attempts at relighting.

The rear engine and aircraft flight recorder, though, was found seriously damaged in the crash and could not be entered by routine means as per the AAIB.

Up to this point, the bureau has issued no safety recommendations regarding the Boeing 787-8 aircraft or the GE GEnx-1B engines or to their manufacturers and operators.

The bureau stated that the investigation is still underway and additional evidence is being collected from various parties that will be analysed in the subsequent phase of the inquiry.

The Boeing 787-8 Dreamliner had crashed on the hostel premises of BJ Medical College near the airport, killing 260 individuals, including 240 of the 241 passengers on the plane.

Up till now, the agency has not requested that any action be taken against the manufacturer or operators of the B787-8 aircraft.

This is the update while Boeing is receiving universal criticism regarding the fatal crash.

General Electric which produces the GE GEnx-1B engine, has also not been issued any recommendations up to this point.

Boeing released a statement stating, "We will defer to the AAIB to provide information about AI171, in accordance with the United Nations International Civil Aviation Organisation protocol known as Annexe 13."