NEW EVIDENCE: Burn Mark Under Air India Flight 171’s Left Engine Path May Shed Light on Explosion Sequence

On July 5, 2025, new evidence emerged in the investigation of the tragic crash of Air India Flight 171, a Boeing 787-8 Dreamliner that plummeted into Ahmedabad’s Meghani Nagar neighborhood on June 12, 2025, just 30 seconds after takeoff, killing 241 of 242 onboard and at least 38 people on the ground. A burn mark discovered under the flight path of the aircraft’s left engine has sparked intense speculation about the explosion sequence that followed the crash. This article examines the significance of this finding, its potential implications for the ongoing investigation, and the broader context of one of India’s deadliest aviation disasters.

The Burn Mark Discovery

According to a report by The Indian Express on July 4, 2025, investigators from India’s Aircraft Accident Investigation Bureau (AAIB), assisted by the U.S. National Transportation Safety Board (NTSB) and the UK Air Accidents Investigation Branch (AAIB), identified a distinct burn mark on the ground beneath the flight path of Flight 171’s left engine. The mark, located approximately 1.2 km from the end of Ahmedabad’s runway 23, was found during a detailed forensic sweep of the crash site. Preliminary analysis suggests it may indicate a pre-impact fire or fuel leak from the left General Electric GEnx-1B67 engine, potentially contributing to the multiple explosions observed upon impact.

The burn mark is described as a scorched, elongated patch, consistent with fuel ignition or an engine-related fire. This finding aligns with earlier reports from The New York Times noting soot and burn marks on the aircraft’s right wing, suggesting that the slats were extended during the crash, possibly during an explosion on the ground. The new evidence under the left engine path raises questions about whether a fire or fuel issue originated in flight, potentially exacerbating the aircraft’s inability to climb and contributing to the catastrophic explosion sequence.

Context of the Crash

Air India Flight 171, bound for London Gatwick, took off from Sardar Vallabhbhai Patel International Airport at 13:38 IST, reaching a maximum altitude of 625 feet before issuing a mayday call reporting a loss of power and thrust. CCTV footage and Flightradar24 data show the aircraft struggling to gain altitude, with its landing gear extended and wings in a nose-up, wings-level orientation before crashing into the hostel block of B.J. Medical College. The crash caused multiple explosions, with thick plumes of smoke and fire engulfing the site, as reported by The Guardian. The sole survivor, Vishwash Kumar Ramesh, a 40-year-old British national seated near an emergency exit, reported hearing a “loud bang” as the plane faltered, fueling speculation about an in-flight anomaly.

The burn mark’s discovery adds a critical piece to the puzzle. Investigators are now exploring whether it indicates an in-flight fire, a fuel system failure, or an external factor such as sabotage, as suggested by some experts like Neil Hansford in The Guardian. While sabotage remains speculative, the burn mark’s location under the left engine path suggests a specific issue with that engine or its fuel system, potentially triggering or contributing to the explosion sequence.

Implications for the Explosion Sequence

The explosion sequence, characterized by multiple blasts and a fireball upon impact, has been a focal point of the investigation. The burn mark suggests that a fuel leak or engine fire may have occurred before the crash, with ignited fuel possibly trailing the aircraft as it descended. This could explain the intensity of the explosions, as the plane was carrying nearly 100 tonnes of fuel for its long-haul flight, according to BBC News. The presence of the Ram Air Turbine (RAT) in the wreckage, as noted by Reuters, indicates a possible total power loss, which could have been compounded by a fire or fuel system failure originating from the left engine.

A simulation conducted by Air India pilots, reported by Hindustan Times on July 2, 2025, attempted to recreate the crash conditions, including deployed landing gear and retracted flaps, but found that these alone were insufficient to cause the crash. The burn mark evidence shifts focus to the left engine, with investigators now analyzing whether a mechanical failure, such as a turbine blade fracture or fuel line rupture, led to an in-flight fire. The Indian Express also referenced a 2020 Gatwick incident involving fuel system contamination in a Titan Airways A321, suggesting that investigators are examining similar possibilities, such as contaminated fuel clogging the GEnx-1B67 engine.

Investigation Focus and Challenges

The AAIB, with support from Boeing, GE Aerospace, and international investigators, has recovered both the Flight Data Recorder (FDR) and Cockpit Voice Recorder (CVR), with data successfully extracted by June 25, 2025, as per The Guardian. The CVR, described as “very clear” by a former Air India captain, indicates no negligence in the cockpit, with pilots attempting to manage the crisis until the final moments. The FDR is being analyzed for engine performance, fuel flow, and flap settings, with particular attention to the left engine’s parameters given the burn mark evidence.

The burn mark complicates the investigation, as the crash site’s extensive damage from explosions and fire has made forensic analysis challenging. The Indian Express noted that the fuel tanks were heavily damaged, but forensic engineers have collected debris to test for contaminants or unusual elements that could indicate fuel system issues. The absence of bird remains, as confirmed by the Directorate General of Civil Aviation (DGCA), rules out a bird strike, while routine aircraft loading eliminates center-of-gravity issues. This leaves mechanical failure, human factors, or external interference as primary theories.

Public and Expert Reactions

The discovery has intensified public interest and speculation, with X posts reflecting a mix of theories and grief. One post by @joshi73264 on June 20, 2025, suggested sabotage due to the rarity of simultaneous engine failure, while @expertwith_AI emphasized the need for black box data to clarify the explosion sequence. These sentiments highlight the public’s demand for answers, though misinformation, such as AI-generated “slop” reports, has complicated the narrative, as noted by The Air Current. Experts like Kishore Chinta, a former AAIB investigator, have called the crash “the rarest of the rare,” emphasizing the improbability of a dual-engine failure at such low altitude (625 feet), which left pilots with no time to recover.

Broader Implications

The burn mark evidence has significant implications for Air India, Boeing, and the aviation industry. Air India, operating 33 Boeing 787s, faces scrutiny over its maintenance practices, despite Chairman N. Chandrasekaran’s assertion of the aircraft’s “clean” engine history. Boeing, already under pressure from 737 Max incidents, now contends with the first fatal 787 crash, prompting the DGCA to order inspections of all 787s in Air India’s fleet. GE Aerospace, which supplied the GEnx-1B67 engines, is assisting the investigation, as a systemic engine issue could affect the 787’s global fleet.

The crash also raises questions about Ahmedabad’s airport infrastructure. Surrounded by dense residential areas, it lacks adequate safety corridors, exacerbating the ground impact. The Guardian noted the crash’s proximity to a hospital complex, with debris hitting a canteen and hostel, highlighting the need for improved urban planning around airports.

Conclusion

The discovery of a burn mark under Air India Flight 171’s left engine path offers a critical clue in unraveling the explosion sequence that claimed 279 lives. Suggesting a possible in-flight fire or fuel leak, this evidence shifts the investigation toward the left engine’s performance and potential mechanical or fuel system failures. As the AAIB analyzes black box data and forensic samples, the burn mark underscores the complexity of the crash, which occurred under rare and catastrophic circumstances. The tragedy, marked by a flickering radar pattern and a rapid descent, continues to challenge investigators, regulators, and the aviation industry, demanding answers to prevent future disasters and honor the memory of those lost.