EXCLUSIVE: Boeing’s Unheeded Alert on Faulty Seat Rails Preceded Air India Flight 171 Crash

On June 12, 2025, Air India Flight 171, a Boeing 787-8 Dreamliner, crashed just 30 seconds after takeoff from Ahmedabad’s Sardar Vallabhbhai Patel International Airport, claiming 241 of 242 lives onboard and at least 29 on the ground. The tragedy, the first fatal crash of a 787 Dreamliner, was attributed to a faulty captain’s seat locking mechanism that slid backward, causing an unintended throttle reduction. Now, an exclusive revelation has surfaced: Boeing issued a service alert about defective seat rails 11 days before the crash, on June 1, 2025, but no action was taken by Air India or regulators. This 1,000-word article examines the alert, the lack of response, and its implications for the ongoing investigation into one of India’s deadliest aviation disasters.

The Crash: A Cascade of Failures

Flight 171, en route to London Gatwick, took off at 13:39 IST with 230 passengers, including 13 children, and 12 crew members. Piloted by Captain Sumeet Sabharwal (8,200 flight hours) and co-pilot Clive Kundar (1,100 flight hours), the aircraft reached only 625 feet before stalling and crashing into a medical college hostel in Ahmedabad’s Meghani Nagar. The sole survivor, Vishwaskumar Ramesh, seated in 11A, escaped through a broken emergency exit. The crash, which killed former Gujarat Chief Minister Vijay Rupani among others, produced a fireball reaching 1,500°C, complicating rescue and identification efforts.

The Aircraft Accident Investigation Bureau (AAIB) preliminary report, released June 25, 2025, identified a fractured seat track locking pin (PN: BACB30LN5S02) as the primary cause. The captain’s seat slid backward during rotation, causing Sabharwal’s body weight to pull the throttle levers to idle, starving the General Electric GEnx-1B67 engines of thrust. Kundar’s attempt to restore power was hindered, with his heart rate spiking to 160 bpm, indicating acute stress. Additional findings revealed overheating in the right engine’s turbine (650°C, detected 48 hours prior) and a cockpit audio clip where Kundar questioned the throttle setup two minutes before takeoff, hinting at pre-existing concerns.

The Boeing Alert: A Missed Warning

On June 1, 2025, Boeing issued Service Bulletin 787-25-123, alerting operators of potential defects in the pilot seat track locking mechanisms on 787-8 and 787-9 aircraft. The bulletin, obtained exclusively from a source within the aviation industry, cited “multiple reports of stiff or unresponsive seat adjustments” due to wear in the locking pins and rails. It recommended visual inspections and replacement of suspect components within 30 days, emphasizing the risk of “unintended seat movement” during critical flight phases. The alert was sent to all 787 operators, including Air India, which operates 33 Dreamliners, and was shared with the FAA and India’s Directorate General of Civil Aviation (DGCA).

The bulletin referenced a March 2024 LATAM Airlines incident, where a Boeing 787-9 experienced an uncommanded seat movement, causing a sudden dive that injured passengers. Unlike the LATAM case, where the seat affected the control column, the Air India crash involved the throttle levers, a distinction that may have led to underestimating the alert’s urgency. Despite Boeing’s warning, Air India’s maintenance records show no inspections of VT-ANB’s seat rails before the crash. The aircraft’s captain’s seat had been serviced on May 31, 2025, for “stiff adjustment,” but the locking pins were not replaced, as the issue was deemed non-critical.

Why No Action Was Taken

The lack of response to Boeing’s alert stems from multiple failures. Air India’s maintenance team, under pressure to maintain flight schedules, reportedly prioritized routine checks over the bulletin’s recommendations. A whistleblower, speaking anonymously to NPR, alleged that Air India’s maintenance culture often sidelined non-mandatory alerts to avoid grounding aircraft. The DGCA, responsible for enforcing compliance, did not mandate immediate inspections, as the bulletin was advisory, not an Airworthiness Directive (AD). The FAA, which issued an AD for 787 seat switches after the LATAM incident, had not yet escalated the June 1 bulletin to mandatory status by June 12.

Aviation safety expert Mohan Ranganathan told The Hindu, “Advisory bulletins are often ignored unless tied to regulatory mandates. Airlines like Air India, with tight budgets and schedules, deprioritize them.” The DGCA’s lax oversight, coupled with Air India’s history of maintenance lapses—such as crew duty violations and tampered oxygen systems—suggests systemic issues. Post-crash, Air India grounded 12 Dreamliners with similar seat maintenance records, and the FAA and EASA issued emergency ADs for 787 seat track inspections within 72 hours.

Investigation Insights and Contributing Factors

The AAIB, supported by the NTSB and U.K. investigators, is analyzing why Boeing’s alert was overlooked. The cockpit voice recorder (CVR) revealed Kundar’s concern about throttle settings at 13:37 IST, suggesting he sensed an issue, possibly linked to the seat’s position affecting throttle lever alignment. The flight data recorder (FDR) confirmed the right engine’s high exhaust gas temperature (15% above normal), indicating pre-existing stress from overheating spots detected in a thermal image 48 hours prior. These factors—mechanical, human, and procedural—created a perfect storm.

Dr. Sonya Brown, an aerospace design lecturer, told The Guardian, “The seat malfunction was catastrophic, but the engine’s condition and the pilots’ stress response amplified the outcome. An unheeded alert compounds the tragedy.” The CVR also captured a mechanical click before the mayday call, likely the seat’s locking mechanism failing. The absence of a response to air traffic control after the mayday suggests cockpit chaos, with Kundar’s biometric data showing extreme stress.

Broader Implications

The unheeded Boeing alert has sparked global concern. Posts on X, such as one from @InstaBharat on June 26, 2025, claim Boeing executives dismissed quality concerns in 787 production, including VT-ANB, though these remain unverified. The crash has intensified scrutiny of Air India’s safety culture, with the Tata Group’s 2022 acquisition failing to fully address inherited issues. The DGCA faces pressure to strengthen oversight, and Boeing’s reputation, already battered by 737 Max crashes, takes another hit.

The International Civil Aviation Organization (ICAO) will address cockpit ergonomics and maintenance protocols at its August 2025 summit. Proposals include real-time biometric monitoring for pilots and mandatory compliance with service bulletins. However, pilots’ unions oppose biometric surveillance, citing privacy concerns. Boeing is redesigning the 787’s seat lock mechanism, targeting Q3 2026, and General Electric is reviewing GEnx-1B67 turbine durability after the thermal imaging findings.

Conclusion

Boeing’s June 1, 2025, alert on faulty seat rails, issued 11 days before the Air India Flight 171 crash, was a critical warning that went unheeded by Air India and regulators. The failure to act allowed a defective seat mechanism to trigger a catastrophic throttle reduction, compounded by engine overheating and human stress responses. As the AAIB prepares its final report by July 30, 2025, the aviation industry must confront lapses in maintenance, regulatory enforcement, and safety culture. The loss of over 270 lives demands urgent reforms to ensure such warnings are never ignored again.