737 MAX Test Flights Are Finally Over

Boeing’s largest 737 MAX has marked a major milestone, with the final planned certification flight now complete.

The final flight now wraps up a test campaign that spanned nearly a thousand flights and allows the jet to move into the final phase before the FAA can approve the high-capacity model.

What The Final 737 MAX Test Flight Means

According to Boeing, the 737-10 flight test program logged 976 flights, totaling more than 2,600 hours in the air, with a further 1,040 hours of comprehensive ground testing. This final certification milestone for the aircraft campaign comes after many evaluations and important fixes implemented through the years.

The flight departed and returned to King County International Airport at Boeing Field, fittingly just across from where the first 737 was built more than half a century ago, evidently showing the progress that has been made.

During the flight, the laboratory smoke detectors, cabin speaker announcements, and other cabin alerts were tested; these were part of the final checks to understand the jet’s interior and were not as dramatic as some of the prior testing.

With the flight completed, Boeing has declared that certification flight testing is 100% complete. This covered a wide range of test points and extreme conditions that would likely never happen in the operational life of most 737-10s, but must be checked.

For Boeing, now being able to finish flight testing not just on the largest 737-10 awaiting certification but also on the smallest 737-7 variant, which is also unapproved, is a necessary step in the recovery efforts, with clear light at the end of the tunnel for the first time in years.

Boeing’s Long Road To This Moment

The journey for the 737 MAX family to reach the completion of flight testing and now move into the paperwork stages has been considerable; the 737-10 first flew in 2021, and this was a troublesome period for the planemaker.

The MAX during this era was grounded and saw subsequent manufacturing problems and heightened Federal Aviation Administration (FAA) scrutiny that pushed certification years beyond what had been initially put forward.

As delays mounted, timelines continued to slip, and airlines’ frustrations grew over repeated missed deadlines, until a leadership change saw now-current CEO Kelly Ortberg appointed, meaning that meaningful progress was not felt to be coming for the important MAX variant.

Now, with new leadership, a new culture and heavy investment, the FAA and Boeing have, across the last 12 months, worked diligently, including the January 2026 approval to move the 737-10 into the second phase of flight testing under what was an expanded Type Inspection Authorization.

By mid-July, Boeing said that it had completed around 98% of the flight certification test hours, and the heavy lifting was laying down assurances in the development reviews and safety assessments of systems rather than flying itself. Now, the latest status shows that these final assessments in the air are completed, with just safety angles and paperwork remaining.

With flight testing complete, Boeing now focuses on items in DAR 4, including finishing those safety submissions and packing the final deliverables for certification to the FAA. A review will then take place with a cross-check of the flight test results and previous findings.

The 737-10 remains on a pathway to certification in 2026, with customer deliveries expected to begin in 2027; however, entry into revenue service is not expected until later, with the relevant training and other necessary handover circumstances initiated.

As the Boeing 737-10 has grown its orderbook, it’s positioned as a critical answer to airlines’ requirements for larger single-aisle jets to meet growing capacity requirements across their network and renewal.

Up against the successful A321neo, Boeing won’t be able to close the gap with the long-established jet truly. However, it can disrupt the market and getting certification is imperative to making inroads in this strategy after years of delays.