The Haunting Final Moments of Air India Flight 171: A Leaked ATC Audio Deepens the Mystery

On June 12, 2025, Air India Flight AI-171, a Boeing 787-8 Dreamliner bound for London Gatwick from Ahmedabad, India, met a tragic fate just 32 seconds after takeoff. The crash, which claimed 260 lives, including 241 passengers and crew onboard and 19 on the ground, remains one of India’s deadliest aviation disasters in decades. A recently leaked air traffic control (ATC) audio, capturing the final four minutes of communication, has reignited public and expert interest in the ongoing investigation. The audio reveals a chilling sequence: a faint alarm tone in the cockpit, the pilot’s urgent last words, and an abrupt descent into static and silence. This article delves into the details of the crash, the leaked audio, and the unanswered questions that continue to haunt investigators, families, and the aviation community.

The Fateful Flight

Air India Flight 171 took off from Ahmedabad’s Sardar Vallabhbhai Patel International Airport at 13:38 IST (08:08 UTC) with 230 passengers and 12 crew members onboard. The flight was commanded by Captain Sumeet Sabharwal, a seasoned pilot with over 15,600 flight hours, and First Officer Clive Kunder, who had 3,400 hours, including 1,100 on the Boeing 787. The aircraft, a 12-year-old Dreamliner, was cleared for takeoff in clear weather conditions, with no reported issues during pre-flight checks. Both pilots had passed breathalyzer tests and were deemed fit to fly, having rested adequately in Ahmedabad the previous day.

Mere seconds after liftoff, the aircraft reached a peak altitude of 650 feet before disaster struck. According to the preliminary report by India’s Aircraft Accident Investigation Bureau (AAIB), both fuel-control switches moved to the “cutoff” position, starving the engines of fuel and causing a catastrophic loss of thrust. The plane crashed into the hostel block of B.J. Medical College, 1.7 kilometers from the runway, killing all but one passenger and causing significant ground casualties.

The Leaked ATC Audio

The leaked ATC audio, which surfaced in early August 2025, has added a haunting layer to the tragedy. The recording captures the final four minutes of communication between the cockpit and Ahmedabad ATC. Approximately four minutes before the crash, controllers noted a faint, persistent alarm tone in the background of the pilot’s transmissions. This sound, described as a low, repetitive beep, is believed to be a cockpit warning, possibly indicating a critical system failure or configuration issue. The exact nature of the alarm remains unidentified, as the AAIB has not released a full analysis of the cockpit voice recorder (CVR).

As the audio progresses, Captain Sabharwal’s voice is heard issuing a desperate “MAYDAY… MAYDAY… MAYDAY… NO POWER… NO THRUST… GOING DOWN…” The transmission, lasting only five seconds, is abruptly cut off by static, leaving controllers with no further response despite repeated attempts to reestablish contact. The silence that follows is chilling, marking the moment the aircraft began its fatal descent. The leaked audio has not been officially verified by the AAIB, but sources close to the investigation confirm its authenticity, raising questions about how and why it was made public.

The Cockpit Mystery

The AAIB’s preliminary report, released on July 8, 2025, revealed a perplexing detail: seconds after takeoff, both fuel-control switches on the Boeing 787 were moved to the “cutoff” position, a maneuver typically performed only after landing. The CVR captured a brief exchange between the pilots, with one asking, “Why did you cut off?” and the other responding, “I didn’t.” The report does not specify which pilot spoke, fueling speculation about whether the action was intentional, accidental, or the result of a mechanical glitch.

The switches, located on the throttle control module between the pilots’ seats, are designed with safeguards to prevent accidental movement. Each switch has a spring-loaded locking mechanism and metal guards, requiring deliberate force to shift to the cutoff position. Aviation experts, including John Nance, have emphasized that such an action during climb is unprecedented and unlikely to occur without clear intent or significant confusion. The report notes that the switches were returned to the “run” position within seconds, triggering an automatic engine relight. However, only one engine began regaining thrust before the crash, while the other failed to stabilize.

The leaked audio’s faint alarm tone adds another layer of intrigue. Experts suggest it could indicate a warning related to engine performance, fuel flow, or an electrical issue. However, without a full CVR transcript or video evidence, investigators face challenges in pinpointing the alarm’s source. The absence of cockpit video recorders, a contentious issue in aviation, has been highlighted as a critical gap in this investigation. The U.S. National Transportation Safety Board (NTSB) has long advocated for cockpit video, arguing it could definitively show which pilot, if any, interacted with the fuel switches.

Speculation and Controversy

The selective disclosure of the CVR excerpt and the leaked ATC audio have sparked widespread controversy. The AAIB and NTSB have criticized media reports as “premature and speculative,” particularly those suggesting pilot error or intentional sabotage. A Wall Street Journal report, citing U.S. sources, claimed First Officer Kunder asked Captain Sabharwal why he turned off the fuel switches, implying the captain’s involvement. However, Indian pilot associations, including the Indian Commercial Pilots’ Association, have condemned such claims as “reckless and unfounded,” arguing they tarnish the pilots’ reputations without evidence.

Both pilots were highly experienced, with Sabharwal known for his meticulousness and Kunder for his passion for aviation. Simulator tests conducted by Air India post-crash showed that even with one engine operational, the aircraft could have climbed safely, suggesting the dual-engine failure was catastrophic at such low altitude. The lack of clear voice identification in the CVR and the absence of a full transcript have fueled theories ranging from human error to a potential system malfunction in the Full Authority Digital Engine Control (FADEC).

The Investigation Continues

The AAIB, supported by Boeing, GE Aerospace, and international experts, is meticulously analyzing the wreckage, CVR, and flight data recorder (FDR). The FDR has confirmed the timeline of events: the fuel switches moved to cutoff at 08:08:42 UTC, the ram air turbine (RAT) deployed five seconds later, and the switches were returned to “run” shortly after. The investigation is also examining the aircraft’s maintenance history, pilot training records, and fuel samples, which have so far been deemed satisfactory.

The leaked ATC audio has intensified calls for transparency. Families of the victims, including Trupti Soni, sister of a deceased passenger, are pursuing legal action in the U.S., citing potential product liability issues with the Boeing 787. The sole survivor, Vishwaskumar Ramesh, remains a focal point of hope and grief, as investigators seek his account to shed light on the final moments.

The Broader Implications

The crash of Air India Flight 171 has reignited debates over aviation safety, cockpit video recorders, and the balance between transparency and investigative integrity. The leaked audio, while providing a haunting glimpse into the pilots’ final moments, underscores the need for comprehensive data to avoid speculation. As the AAIB prepares its final report, expected within a year, the aviation world watches closely, hoping for answers to prevent such a tragedy from recurring.

The faint alarm tone, the pilot’s desperate mayday call, and the static silence that followed will linger in the minds of those touched by this disaster. For now, the mystery of Flight 171 remains unresolved, a stark reminder of the fragility of flight and the enduring quest for truth in the face of tragedy.