The investigations into major aviation accidents depend on several factors and involve multiple variables, making it impossible to specify a fixed timeline for the final report, the ministry said in a written reply to a question in the Upper House.
"The timeline for completing a major air accident investigation cannot be predicted,” the Ministry’s statement said.
It also said that all probable causes and contributing factors leading to the accident are being investigated, indicating that the probe remains comprehensive and no conclusions have been reached so far.
The ministry further informed the Rajya Sabha that the inspection of the complete Thrust Control Module at the original equipment manufacturer's (OEM) facility is underway as part of the ongoing investigation.
The Ministry of Civil Aviation had earlier, in a reply, also stated in Parliament that the Aircraft Accident Investigation Bureau (AAIB) is “transparently” conducting its investigation into the Air India Boeing crash on June 12 last year and “all probable causes leading to the accident are being investigated.”
A preliminary investigation report was published by AAIB on July 12, 2025, and the same is available on their website www.aaib.gov.in. The investigation is in progress, and the final report will be published after completion of the investigation, the ministry stated in a written reply to a question in the Rajya Sabha.
“As per the ICAO Annex 13 requirements, the interim statement has been published by AAIB on June 12, 2026. The final investigation report will be published after completion of the investigation,” the ministry added.
As many as 260 people were killed when the AI-171 Boeing Dreamliner flight from Ahmedabad to London-Gatwick on June 12 crashed within 35 seconds of taking off. While 241 people on board the Dreamliner lost their lives, 19 people were killed on the ground. One passenger on the plane had a miraculous escape.
The preliminary report released by the AAIB on July 12 stated that both engines of the ill-fated Air India Boeing 787 Dreamliner lost thrust after the two fuel cut-off switches moved from the ‘RUN’ to the ‘CUTOFF’ position. However, the cockpit voice recorder has revealed that one of the pilots told the other that he did not turn off the fuel control switches. The fuel switches were then returned back to the RUN position just before the plane crashed.
Union Civil Aviation Minister Ram Mohan Naidu earlier said that the Aircraft Accident Investigation Bureau’s report on the Air India crash was based on preliminary findings, and urged against reaching any conclusions until the final report is released.