Boeing Completes Final 737 Max 10 Certification Flight Test Ahead of Year-End Approval

Boeing has concluded the final planned flight test for the 737 Max 10 variant, putting the airframer on course to secure regulatory certification before the end of 2026. This milestone marks a critical step in the type's approval process as Boeing prepares to bring the Max 10 into service alongside the Max 7 model, which is also undergoing certification now.

The final test flight focused on an interiors evaluation, specifically verifying the audibility of the lavatory smoke detector and the cabin speaker system. Conducted from King County International Airport (Boeing Field) in Seattle, this mission culminated three Max 10 aircraft logging a combined total of approximately 2,060 flight hours throughout the certification programme.

Alongside the 737 Max 10, Boeing is simultaneously progressing the certification of its Max 7 variant. The company anticipates achieving Max 7 approval during the summer of 2026, followed by the Max 10 clearance before year-end. Delivery of both variants is planned to commence in 2027, reflecting Boeing’s schedule to expand its Max family offerings to customers.

Several critical design enhancements have been tested during the flight programme. Among these are a redesigned engine anti-ice system and an enhanced angle of attack (AoA) system. The anti-ice system was modified to address overheating issues in engine inlet inner barrels under certain conditions, with the addition of turbulators on the forward fan cases of the twin CFM International Leap-1B engines.

This turbine air inflow modification increases the swirl of air entering the engines, pulling in cooler air and thus reducing temperature stress, according to Boeing’s vice-president of 737 development, Chris Payne. The improved anti-ice measures are planned for implementation across all Max models, including those currently in service worldwide.

The upgraded AoA system aims to mitigate pilot workload and prevent information overload if one of the Max's dual AoA sensors malfunctions. This enhancement originated from lessons learned following the investigations into the two fatal 737 Max crashes in 2018 and 2019. The new system flags AoA issues by inhibiting the stick shaker and providing a simple cockpit message indicating an AoA fault.

As Boeing moves beyond flight testing, the program now enters the phase of closing development assurance reviews and system safety assessments. Boeing has submitted final documentation to the US Federal Aviation Administration (FAA), signifying the shift from testing to certification evaluation. This procedural progression is key to unlocking operational approval and subsequent aircraft deliveries.

The completion of 737 Max 10 flight testing represents a significant step in Boeing’s strategy to refresh and expand the 737 family, especially as the Max 10 is the largest variant with increased passenger capacity. Its entry into service is expected to provide airlines with improved economics on high-density routes while benefiting from Boeing’s latest safety enhancements.

With this milestone behind it, Boeing now concentrates on the final regulatory hurdles and production preparations to ensure a smooth ramp-up for the 2027 introduction of the Max 7 and Max 10. The ongoing updates across the Max fleet demonstrate Boeing’s commitment to improving safety and operational performance following earlier challenges faced by the program.