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US Expert: Boeing 787 Experienced Fuel Switch Cut-Off in 2019; Japanese Pilots Did Not Intervene
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US Expert Highlights Fuel Switch Cut-Off in 2019 Boeing 787 Incident; Japanese Pilots Did Not Intervene
A preliminary investigation into the Air India AI 171 crash in Ahmedabad has renewed focus on the Boeing 787’s fuel switch system. India’s Aircraft Accident Investigation Bureau (AAIB) reported that the fuel switch had shifted from the “Run” to the “Cutoff” position prior to the crash. The 15-page report, released this week, included a paraphrased exchange between Captain Sumeet Sabharwal and First Officer Clive Kunder, in which one pilot questioned the other about cutting off the fuel supply. Both pilots denied any deliberate action to do so. Shortly thereafter, a Mayday call was issued, and the aircraft crashed into a hostel for medical students, resulting in the deaths of all on board.
The AAIB report does not clarify how or why the fuel switch moved to the “Cutoff” position, leaving open the possibility of either pilot error or mechanical malfunction. To provide further insight, FinancialExpress.com consulted Mary Schiavo, a US aviation expert, who dismissed theories of intentional pilot intervention. Schiavo emphasized the absence of evidence supporting deliberate action and called for the full release of cockpit voice recorder (CVR) transcripts to avoid misinterpretation. She stated, “There is nothing here to suggest pilot suicide or murder.”
Parallels with 2019 ANA Boeing 787 Incident
Schiavo also referenced a similar event in 2019 involving an All Nippon Airways (ANA) Boeing 787. During final approach from Tokyo to Osaka, both engines failed after the aircraft’s software erroneously detected that it was on the ground. This triggered the Thrust Control Malfunction Accommodation System, which cut fuel to the engines. According to Schiavo, the pilots did not engage the fuel cutoff switches. The malfunction was ultimately traced to a software glitch rather than human error. The ANA flight, carrying 109 passengers and 9 crew members, landed safely without injuries.
Regulatory Response and Ongoing Investigations
The Air India crash has intensified scrutiny of Boeing’s fuel switch mechanisms. India’s civil aviation authority has ordered inspections of cockpit fuel switches on Boeing aircraft following the AAIB’s findings. Meanwhile, the US Federal Aviation Administration (FAA) and Boeing have maintained that the fuel switch locks are safe. However, investigations continue to explore whether the Ahmedabad crash resulted from pilot action or a technical fault.
Regulatory bodies worldwide are responding to these concerns. The UK Civil Aviation Authority (CAA) issued a warning just weeks before the crash, highlighting potential issues with fuel shutoff valves on several Boeing models, including the 737, 757, 767, 777, and 787. The fuel control switches, housed within the Throttle Control Module (TCM), had been replaced on the ill-fated AI 171 aircraft in both 2019 and 2023. Despite these replacements, questions remain regarding the reliability of the locking mechanism.
The heightened regulatory scrutiny and ongoing investigations have placed significant pressure on Boeing, with potential repercussions for its market position and investor confidence. As authorities continue to determine the root cause of the AI 171 crash, the aviation industry is preparing for possible safety reviews and further regulatory measures.

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