NEW DELHI: The Aircraft Accident Investigation Bureau (AAIB) on Saturday released its preliminary reports on the investigation about the Air India plane crash in Ahmedabad on June 12.According to the report, “The Engine N1 and N2 began to decrease from their take-off values as the fuel supply to the engines was cut off. In the cockpit voice recording, one of the pilots is heard asking the other why did he cutoff. The other pilot responded that he did not do so.”The AAIB added that “both engines were retrieved from the wreckage site and quarantined at a hangar in the airport.” It further stated, “Components of interest for further examinations have been identified and quarantined.”The investigation centres around Air India’s Boeing 787-8 flight AI 171 en route to London Gatwick that crashed into a medical hostel complex shortly after take-off from Ahmedabad last month, killingover 270, including 241 onboard the plane. One passenger survived the crash. It was the first time that the best-selling wide-body Dreamliner or Boeing 787 suffered a fatal accident resulting in hull loss.