Quick summary
India’s Aircraft Accident Investigation Bureau will issue an interim update rather than a final report on the June 12, 2025 crash of Air India Flight 171, with the full findings delayed by approximately three months as analysis of the GE Aerospace engines and associated electronic controls continues in France and the United States. The crash of the Boeing 787-8 shortly after takeoff from Ahmedabad killed 260 people in total — passengers, crew, and at least 19 on the ground — making it India’s worst aviation disaster in more than a decade and the first fatal hull loss of a 787.
The central question — why both fuel control switches moved from RUN to CUTOFF within one second of each other just after liftoff — remains officially unanswered. Whether that sequence reflects pilot action, a technical fault, or something more complex is still being determined.
One year on, the crash of Air India Flight AI171 still has no official explanation.
India’s Aircraft Accident Investigation Bureau confirmed it will not deliver a final report by the June 12, 2026 anniversary of the disaster, opting instead for an interim update while engine-related analysis remains incomplete. The final report is expected to slip by roughly three months, pushed back by unfinished work on the 787’s GE Aerospace powerplants and the electronic engine-control systems that govern fuel delivery.
The crash itself lasted approximately 30 seconds. The Boeing 787-8, registration VT-ANB, lifted off normally from Ahmedabad’s Sardar Vallabhbhai Patel International Airport on a scheduled service to London Gatwick, then lost all thrust within seconds as both engine fuel control switches moved to CUTOFF. The aircraft struck a medical college hostel complex 1.7 kilometres from the runway. Of the 242 people onboard, one survived. Nineteen more died on the ground.
For travelers on the Ahmedabad–London corridor — and for anyone flying on a 787 operated by Air India or any other carrier — the delay means the most important safety question raised by this accident will remain open for months longer than international standards anticipated.
What the preliminary report found, and what it left open
The AAIB’s preliminary report, issued in July 2025, established the physical sequence with unusual precision. Both fuel control switches moved from RUN to CUTOFF within about one second, roughly three seconds after takeoff. Fuel starvation caused a total loss of thrust at low altitude, leaving the crew with no viable recovery option.
What the preliminary report did not establish was why. The cockpit voice recorder captured one pilot asking the other why he had cut off the fuel. The other pilot said he had not. The AAIB did not identify which pilot made which statement, and it did not conclude whether the switch movement was deliberate, accidental, or the result of a system fault.
That ambiguity has driven a year of intense dispute. Some aviation professionals read the CVR exchange as pointing toward inadvertent crew action. Others argue the report fails to rule out an electrical anomaly, a software fault, or a failure in the engine-management electronics — and an independent investigation published by The Caravan magazine alleges a cascading electronic failure locked the crew out of manual override entirely, directly contradicting the official preliminary framing.
The Federation of Indian Pilots has called for an independent judicial probe and has opposed the release of another interim report if it lacks sufficient technical context, warning that incomplete findings will deepen speculation rather than resolve it. Lawyers and safety campaigners have separately raised questions about the timing of the 787’s ram air turbine deployment and the attempted engine relight sequence — details that bear on whether the crew had any meaningful window to act.
| Date / milestone | Event | Status |
|---|---|---|
| June 12, 2025 | AI171 crashes 30 seconds after takeoff from Ahmedabad; 260 killed | Confirmed |
| July 2025 | AAIB preliminary report issued; fuel switches found moved to CUTOFF within ~1 second | Published |
| June 12, 2026 | AAIB interim update expected (anniversary obligation under Annex 13) | Pending |
| ~September 2026 | Final AAIB report now expected, delayed ~3 months for engine analysis | Delayed |
| Ongoing | GE Aerospace engine and electronic control analysis in France and United States | In progress |
| Ongoing | NTSB and FAA participating as Annex 13 technical advisers on Boeing and GE components | Active |
Air India has denied that the aircraft had unresolved safety issues before the crash. Regulatory filings confirm the 787-8 was correctly configured and lifted off normally before the power loss began. Full technical detail on the AAIB’s role and the fuel-control switch findings is confirmed in official investigation documentation.
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Why a delayed report does not mean a resolved risk
History offers a calibration point. The Ethiopian Airlines Flight 302 Boeing 737 MAX crash on March 10, 2019 produced a global grounding within days, but full causal clarity and coordinated regulatory action took many months — and the MAX remained out of service for roughly 20 months while design fixes and retraining were completed. The 787’s 2013 battery incidents followed a similar arc: extended technical probe, temporary grounding, redesign, return to service.
Those cases share a pattern worth noting. Prolonged investigations do not typically end with permanent removal of an aircraft type from service. They end with formal design fixes, updated procedures, and revised training. The uncertainty in the interim, though, is real — and it affects booking confidence, insurer posture, and leasing decisions even before a single airworthiness directive is issued.
For the 787 specifically, the AI171 investigation is the first fatal hull loss the type has faced. That means there is no prior crash-investigation template for how regulators and manufacturers will respond once findings are finalized. Until the AAIB issues safety recommendations, neither the FAA nor DGCA is obligated to mandate design or training changes specific to this event — though both retain authority to act on interim findings if new risks emerge.
Steps for travelers with bookings on this route
The AI171 investigation is active and unresolved — no airworthiness directives specific to this event have been issued, but the fuel-cutoff sequence that caused the crash has not been officially explained, and the final report is now months away.
- Monitor the AAIB interim update: The anniversary interim report is expected around June 12, 2026. If it includes new detail on the engine electronic controls or cockpit sequence, it may prompt targeted advisories or crew training updates. If it is high-level only, expect continued uncertainty through September.
- Check for FAA or DGCA airworthiness directives: Any directive referencing 787 fuel-control switches or GE engine management systems would signal a hardware or software mitigation path. No such directive has been issued as of publication. Track the FAA’s airworthiness directive database directly if this is a concern.
- Know your aircraft type before booking: Use Google Flights seat-map filters or SeatGuru to confirm aircraft type on your specific flight. Air India operates both 787 and Airbus A350 equipment on long-haul routes. Middle Eastern and European carriers also serve western India–London routings on different aircraft types.
- Understand your rights if you rebook: If you have an existing Air India booking and wish to change it, check the fare conditions. Voluntary changes for safety concerns are not covered by EU261 or equivalent consumer protections — those apply to airline-initiated disruptions, not passenger-initiated changes.
- Keep travel insurance documentation current: A medical evacuation or repatriation from a remote incident costs upward of $50,000. Ensure your policy covers the full itinerary and is not voided by government travel advisories for either endpoint.
Watch: The AAIB interim update due around June 12, 2026 is the next hard signal. If it narrows the fuel-cutoff cause to a specific system or component, expect follow-on action from the FAA and DGCA within weeks. If it does not, the investigation timeline extends to approximately September 2026 with no interim regulatory obligation to act.
Questions? Answers.
Is it safe to fly on a Boeing 787 right now?
No airworthiness directive specific to the AI171 crash has been issued by the FAA, EASA, or DGCA as of June 2026. The 787 fleet continues to operate globally under existing certification and safety standards. The AI171 investigation has not produced findings that regulators have determined require immediate fleet-wide action. That said, the cause of the fuel cutoff sequence remains officially unresolved, and travelers who want a definitive technical answer will need to wait for the final AAIB report.
What does the AAIB interim report actually mean — is it the same as a final report?
No. Under ICAO Annex 13, if a final report cannot be issued within 12 months of a crash, investigators must publish an interim statement on the anniversary. This interim update confirms the investigation is ongoing and may include new factual findings, but it does not carry the same weight as a final report. Safety recommendations — the formal mechanism that triggers regulatory and manufacturer action — are typically issued with or after the final report, not the interim update.
Why are the engines still being analyzed a year after the crash?
The GE Aerospace engines and their associated electronic engine-control systems are central to determining whether the fuel cutoff was caused by crew action, a technical fault, or a combination of both. Engine electronic controls involve complex software and hardware interactions that require specialized laboratory analysis. Work has been conducted in France and is continuing in the United States, reflecting the multinational nature of the investigation under Annex 13 state-of-design provisions.
What happens if the final report finds a technical fault in the 787’s fuel-control system?
If the AAIB issues a safety recommendation pointing to a design or software issue, the FAA and DGCA would be required to formally respond — typically by issuing an airworthiness directive mandating inspections, modifications, or operational restrictions across the global 787 fleet. Boeing and GE Aerospace would likely issue corresponding service bulletins. The timeline from recommendation to mandatory action varies but historically runs weeks to months for high-priority findings.
