Preliminary findings into the June 12 crash of Air India flight AI‑171 from Ahmedabad to London Gatwick point to pivotal electrical or software failures that may have triggered the aircraft’s fuel control switches without pilot input. Investigators are exploring whether such an “un-commanded transition” could explain why both engines lost thrust within seconds of liftoff.
The Boeing 787‑8 Dreamliner, registration VT‑ANB, departed at 13:38 IST and climbed to approximately 180 knots when data shows its fuel control switches moved from “RUN” to “CUTOFF” one second apart, abruptly severing fuel flow and prompting both engines to flame out. Surveillance video captured deployment of the ram air turbine, signalling engine failure; an automatic emergency response typically seen when thrust is lost. One pilot is heard asking, “Why did you cut off?” while the other replied, “I did not,” according to cockpit voice records.
Inspectors noted that moving the fuel switches required deliberate mechanical action: they must be pulled out and shifted, then retracted into a locked position – a design meant to prevent inadvertent movement. Yet, previous technical records for the aircraft show multiple electrical and software snags: a stabiliser position transducer malfunction logged just hours before, power system warnings, mistakenly flagged fuel alerts, a December 2024 ground abort due to an electrical fault, and a 2015 emergency landing linked to a Cabin Air Compressor surge. Officials caution these incidents were addressed under standard Boeing procedures, but are probing whether a cascading chain of system anomalies could have produced unintended switch movement.
Pilot organisations, including the Indian Commercial Pilots Association and Airline Pilots’ Association of India, dispute human error narratives. They dismissed insinuations of deliberate action as “reckless and unfounded,” criticising what they perceive as premature conclusions. Those unions, along with IFALPA, call for an impartial examination of data without vilifying crew members.
U. S.-based flight safety analysts emphasise that the dual-engine flame-out, rare on a twin-engine jet unless fuel is cut off, suggests human input. However, they note that committing such an action during takeoff defies standard procedures and presents improbable odds of accidental engagement. The NTSB chair, Jennifer Homendy, has cautioned against speculation, noting that U. S. support continues while India’s AAIB conducts the formal inquiry.
Electrical and software failure remains a plausible alternative. The AAIB’s preliminary report acknowledges a 2018 FAA notice regarding potential disengagement of fuel‑switch stop‑locks – although this aircraft’s maintenance logs show no related inspections had been carried out on VT‑ANB. Investigators are now exploring whether the FADEC unit may have misinterpreted signals, initiating an unintended automated switch to CUTOFF.
Aviation experts have highlighted the complexity of the Dreamliner’s “more-electric” architecture, which routes traditional pneumatic and hydraulic functions through electrically driven systems. Any disruption in this landscape could, in theory, have unexpected effects on engine controls. The line of enquiry is whether the faults noted in electrical logs could align chronologically with the exact moment of the switch transitions.
The crash claimed 241 lives onboard and 19 on the ground, leaving a single survivor, British national Vishwash Kumar Ramesh. His account included hearing a loud bang immediately after takeoff. The tragedy prompted DGCA-mandated inspections of Air India’s Boeing 787 fleet, including expanded checks on fuel‑parameter systems, engine fuel‑actuation, and electronic controls.
Air India has emphasised a cooperative stance with investigators, while its chief executive has warned against rushing to judgment. Families of the victims remain deeply affected, voicing frustration at speculative coverage and emphasising the demand for transparent, evidence-based findings.
The next phase of analysis hinges on data logs from the black boxes and technical records, focusing on whether switch movement was purely mechanical or rooted in a software-driven command. This will also determine whether future risk‑mitigation efforts should target human factors, design safeguards around switch mechanisms, or deeper system redundancies in critical software.
Regulators and manufacturers – including Air India, DGCA, Boeing, GE Aerospace, FAA, NTSB, and AAIB – are working together to unravel a sequence that unfolded in mere seconds yet had irreversible consequences. Their joint findings will shape aviation safety standards, especially around the increasingly complex interactions of electric systems and human–machine interfaces in next‑generation aircraft.
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