Will Boeing's 737 MAX 10 Clear Final FAA Certification Hurdles?

January 10, 2026 at 06:31 AM•3 min read

The FAA approved the largest Boeing 737 MAX 10 variant to enter the second phase of flight testing, but a critical engine deicing issue remains unresolved.

Key Points

1FAA authorized the 737 MAX 10's move to the second phase of flight testing, a major certification step.
2The engine deicing system issue is the primary remaining certification hurdle for both the MAX 7 and MAX 10.
3The MAX 10 is crucial for Boeing's competition with the Airbus A321neo and has over 1,200 orders in its backlog.

The Federal Aviation Administration (FAA) has approved a key step for the largest 737 MAX variant. The Boeing 737 MAX 10 can now move into the second phase of certification flight testing. This advancement is a significant milestone for the long-delayed aircraft program. However, a critical technical hurdle remains in the regulatory approval process. The manufacturer still needs to resolve a persistent engine deicing system issue.

Certification Milestone

The FAA approval allows Boeing to begin Type Inspection Authorization (TIA) Phase 2 testing. This stage lets the plane maker accumulate necessary certification credit. Phase two focuses on verifying the aircraft's avionics, propulsion, and structural elements. Industry analysts see this progress as a positive sign. Boeing executives remain optimistic about finishing certification this year. The company aims to certify both the MAX 7 and the Boeing 737 MAX 10 certification in 2026.

The Engine Deicing Challenge

The primary factor delaying the final approval is the unresolved engine deicing system issue. This problem affects both the MAX 7 and the MAX 10 models. The current design risks overheating the engine nacelle's composite structure. This could cause structural damage under prolonged use in dry air conditions. Boeing has been working on a redesign to meet all aircraft safety standards. The company is finalizing its analysis for the FAA's review. The regulator is maintaining strict oversight throughout the process.

Industry Impact and Outlook

The successful certification of the largest 737 MAX variant is vital for Boeing's narrowbody program. The MAX 10 is designed to compete directly with the highly successful Airbus A321neo. Delays risk losing more market share to the European competitor.

Boeing holds over 1,200 orders for the MAX 10 in its backlog. Major customers like Alaska Airlines and WestJet are awaiting their first deliveries. Analysts believe the MAX 10 is crucial for boosting Boeing's revenue and cash flow. The move to the next FAA flight testing phase provides momentum. However, final production ramp-up depends entirely on obtaining the final type certificate. The aviation industry continues to monitor this development closely for more commercial aviation news. For more updates on global aerospace programs, visit https://flying.flights.

The FAA authorized the 737 MAX 10's move to the second phase of flight testing, a major certification step.
The engine deicing system issue is the primary remaining certification hurdle for both the MAX 7 and MAX 10.
The MAX 10 is crucial for Boeing's competition with the Airbus A321neo and has over 1,200 orders in its backlog.