DGCA Inspects Boeing Facility Over 787 Fuel Switch Defects

A team from India’s Directorate General of Civil Aviation (DGCA) visited a Boeing facility in the United States earlier this month to inspect the Boeing 787 fuel control switch (FCS) system. This technical review follows a February 2, 2026, incident involving Air India flight AI132, where a pilot reported that the fuel control switch inadvertently slipped from the 'RUN' position to 'CUT OFF'.

The Catalyst for Regulatory Scrutiny

The inspection marks a significant escalation in oversight following the fatal crash of Air India Flight 171 in June 2025, which resulted in 260 fatalities. Preliminary findings from the Aircraft Accident Investigation Bureau (AAIB) suggested that fuel switches moved to the 'CUTOFF' position shortly after takeoff. In response to that event, the DGCA mandated a fleet-wide inspection of the locking mechanisms on Boeing 787 and 737 aircraft. Air India has completed detailed inspections of its Boeing 787-8 and 787-9 aircraft under the oversight of India's aviation regulator, the DGCA.

Historical Context and FAA Advisories

The current scrutiny aligns with earlier safety warnings regarding cockpit control hardware. In 2018, the Federal Aviation Administration (FAA) issued Special Airworthiness Information Bulletin (SAIB) NM-18-33, which alerted operators to potential disengagement of the fuel control switch locking feature. While the FAA previously maintained that this did not constitute an unsafe condition requiring a mandatory Airworthiness Directive, the recent incidents in India have prompted a re-evaluation of such non-mandatory advisories. Air India had checked the fuel control switches on all Boeing 787 aircraft in its fleet after a directive from the DGCA.

Technical Analysis: The 787 Fuel Control Mechanism

Historically, the aviation industry has relied on the SAIB framework to manage non-critical component wear. However, the recent DGCA intervention signals a shift toward mandatory oversight for legacy components. The Boeing 787 fleet, which includes 27 Boeing 787-8 Dreamliner aircraft operated by Air India, is now subject to hyper-vigilance during engine start procedures. The trajectory of this investigation suggests that regulators are moving toward requiring a standardized, more robust locking mechanism to prevent inadvertent movement of the FCS during critical phases of flight.

What Comes Next: Boeing Seattle Fuel Switch Testing Results

The DGCA and Boeing are expected to finalize their review of the testing results by Q3 2026. This data will be instrumental for the AAIB as it prepares the final investigation report on the June 2025 crash, which is anticipated by mid-2026. These milestones will likely determine whether a global retrofit of the fuel control module becomes a mandatory requirement for the Boeing 787 fleet.

Why This Matters for Boeing and Component Manufacturers

This development carries significant weight for Boeing Commercial Airplanes and component manufacturers like Honeywell, which supplied the original switch modules. The intensified regulatory scrutiny introduces a high-severity risk for these stakeholders, as it may necessitate a costly fleet-wide redesign. Furthermore, for Air India, the incident highlights the operational challenges of managing legacy safety advisories within a modern, complex widebody fleet.