New Delhi, India: Indian investigators are preparing an interim report into last year’s fatal Air India Boeing 787 Dreamliner crash instead of a final report, as authorities continue examining one of the deadliest aviation disasters.
According to Reuters, the Aircraft Accident Investigation Bureau (AAIB) is expected to issue the interim findings ahead of the first anniversary of the June 12, 2025 crash involving Air India Flight AI171, which was operating from Ahmedabad to London Gatwick. The accident killed 260 people after the Boeing 787-8 lost thrust moments after takeoff and crashed into a medical college hostel near the airport.
The interim document will be “more comprehensive” than the 15-page preliminary report released in July 2025 and is expected to examine possible primary causes and contributing factors behind the crash. However, investigators said the final report is still not ready because of the complexity of the inquiry and the time required for additional analysis.
The preliminary AAIB report found that the aircraft’s engine fuel control switches moved almost simultaneously from the “RUN” to “CUTOFF” position shortly after takeoff, starving both engines of fuel. Cockpit recordings reviewed during the investigation indicated confusion between the pilots over the movement of the switches.
The early assessment by U.S. officials reviewing cockpit voice recordings supported the view that the captain may have cut fuel flow to the engines. Indian investigators, however, said at the time that it was “too early to reach any definite conclusions.”
The ongoing investigation involves multiple international agencies because the aircraft was designed and manufactured in the United States. The U.S. National Transportation Safety Board (NTSB) is participating in the probe, while Boeing is assisting as a technical adviser.
By issuing an interim report instead of a final one, Indian authorities will not be required to circulate draft findings in advance to the NTSB for review and comment. Under International Civil Aviation Organization (ICAO) rules, draft final reports are generally shared with participating states for consultation before publication.
The investigation has gained renewed attention following a separate Air India Boeing 787 incident earlier this year involving fuel control switches. In February 2026, pilots operating a Dreamliner flight from London to Bengaluru reported that the fuel switches did not remain fixed in the “RUN” position during engine start attempts before stabilizing on a third attempt.
Indian aviation regulator Directorate General of Civil Aviation (DGCA) officials are expected to travel to Boeing facilities in Seattle in June to observe testing of the fuel switch panel from that aircraft.
Under international aviation standards, a final accident report is generally expected within one year of a crash. If the investigation remains incomplete, authorities are required to issue an interim statement outlining progress in the inquiry. Investigators said work on the final report is continuing and no timeline has been confirmed for its release.
