Boeing's Largest 737 MAX Advances in Certification, Yet Challenges Remain

• Boeing holds more than 1,200 orders for the MAX 10 in its backlog, with deliveries viewed as critical to improving the company's revenue and cash flow
• Phase two testing approval covers avionics and propulsion systems, but the engine deicing issue affecting both MAX 7 and MAX 10 variants has not been resolved
• Boeing cannot begin production at its Everett, Washington plant until full certification is achieved, and the MAX 7 variant did not receive approval to advance testing

Boeing 737 MAX 10 Certification Summary

Key Development:

The Federal Aviation Administration (FAA) has approved Boeing's 737 MAX 10, the largest variant of its best-selling jet, to advance to phase two of flight testing in its certification campaign. This marks progress in the long-delayed approval process, though significant challenges remain.

Critical Figures:

• Boeing holds over 1,200 orders for the MAX 10 in its backlog
• The company received FAA approval in October to increase 737 MAX production to 42 planes per month, up from a 38-plane cap imposed in January 2024
• Phase two approval applies only to the MAX 10, not the smaller MAX 7 variant

Outstanding Issues:

Boeing faces continued delays due to an unresolved engine deicing problem affecting both the MAX 7 and MAX 10 models. Phase two testing covers avionics, propulsion, and other design elements, but the deicing issue must still be addressed before full certification.

Market Implications:

Industry analysts view MAX 10 deliveries as critical to boosting Boeing's revenue and cash flow. The aircraft competes directly with Airbus' A321neo in the lucrative single-aisle market segment. However, without final certification, Boeing cannot begin production at its Everett, Washington facility.

Boeing executives expect to complete certification for both MAX variants in 2026. The MAX 7 and 10 are based on the already-operational MAX 8 and 9 models, which have accumulated tens of thousands of flight hours.

Analyst Perspective:

Scott Hamilton of Leeham Company cautioned that while this represents progress, Boeing needs a clear path to final certification before meaningful production can commence.