AviationNews – Boeing has completed the official flight-test campaign for its largest narrowbody jet, the 737-10, marking a vital milestone toward securing Federal Aviation Administration (FAA) certificering. The completion of planned air testing clears the path for final regulatory documentation and safety assessments, bringing the long-delayed jet closer to commercial service.
The flight-test program for the 737-10 spanned 976 individual flights, accumulating over 2,060 flight hours alongside roughly 1,040 hours of rigorous ground testing across three dedicated test aircraft. Originally targeted for entry into service in 2023, the variant faced extended development timelines as Boeing and aviation regulators instituted comprehensive safety enhancements following historical fleet groundings. Operating primarily out of King County International Airport at Boeing Field in Seattle, the test fleet underwent comprehensive evaluations covering extreme operational envelopes, system reliability, and key cross-fleet software and hardware modifications.
Engineers validated critical operational systems during the multi-year flight campaign, assessing main landing gear behavior, wet-runway braking performance, and maximum-energy rejected takeoffs. The testing also proved pivotal for certifying an updated engine anti-ice system and an enhanced Angle of Attack (eAoA) sensor suite designed to reduce erroneous cockpit alerts across the entire 737 MAX family. The final test flight evaluated cabin safety systems, verifying that flight crews could clearly hear lavatory smoke detector alarms and passenger address announcements throughout the cabin.
“Reaching this milestone is a huge testament to the commitment and dedication of the entire team,” said Chris Payne, Vice President and General Manager of 737 Development Programs at Boeing. “This is an important step on our journey, and we are focused on building on it as we move forward.”
With air testing concluded, Boeing is shifting its focus toward finishing remaining development assurance reviews and system safety assessments for final submission to the FAA. The manufacturer targets formal FAA certificering before the end of 2026, clearing the way for initial airline customer deliveries to begin in 2027.
The completion of 737-10 flight testing reflects significant engineering progress for Boeing‘s narrowbody lineup following years of regulatory scrutiny. As final documentation moves to regulators, global airlines now have a clear timeline for integrating the largest MAX variant into their fleets.
