Boeing entered the second half of 2026 with the 737 MAX 10 in Type Inspection Authorization Phase 2 — the final certification flight-test gate — and a stated FAA position that nothing observed so far would prevent type certification before year-end. That is the official line, and FAA Administrator Bryan Bedford repeated it to Bloomberg in April. The practical line, repeated quietly by airline planners, is that first deliveries will not happen until 2027 regardless of when the paperwork closes, and that any new finding from the final test campaign pushes the entry-into-service window into late 2027 or beyond.
The certification state in numbers
The MAX 10 received expanded flight-test clearance in late 2025 and entered TIA2 on January 9, 2026, which is the FAA’s last sign-off before issuing a type certificate. The primary technical hurdle of the program — a redesign of the engine anti-ice system that could cause thermal damage to the CFM LEAP-1B nacelle during prolonged icing exposure — appears to be resolved at the design level and is now being demonstrated in the test envelope. Boeing’s Q1 2026 earnings disclosure framed the program as on track for year-end certification. The FAA framed it the same way in April. Independent observers have framed it as on track but with no margin.
The order book
As of February 2026, MAX 10 firm orders sit above 1,400 units, part of a wider MAX backlog above 4,850 unfilled positions across the family. The MAX 10 share of that book reflects the variant’s positioning as the direct A321neo competitor on capacity per seat-mile. Delta’s 100-unit Farnborough 2022 commitment, with 30 options, is the structural anchor of the US fleet plan. United holds upwards of 100 MAX 10 positions but has signalled through CEO Scott Kirby that some of those positions may convert to MAX 9 frames given the delivery delays. The order book is committed in dollar terms; the variant mix may shift.
Delta’s planning window
Delta now expects its first 20 MAX 10s in 2026, with the remaining 80 frames thereafter. That schedule was last reset in February 2025 after Boeing slipped its EIS guidance. Delta’s planning assumes the type slots into its narrowbody fleet alongside the existing A321neo and A220 lines, with the MAX 10 used on transcontinental and dense short-haul flying where the per-seat economics favour the larger narrowbody. The first frames are pencilled for crew familiarisation and route-proving rather than full revenue deployment, which means the productive contribution to Delta’s 2026 ASMs will be modest.
United’s hedge
United’s MAX 10 position is the larger strategic question. Scott Kirby’s public request that Boeing pause MAX 10 production and convert some positions to MAX 9 reflected genuine doubt about the certification timeline rather than negotiating posture, and United has not retracted the statement. The carrier has separately taken A321neo deliveries to backfill capacity that the MAX 10 was meant to provide. United’s order book remains intact on paper, but the planning fiction that the MAX 10 would be a 2024-2025 capacity contributor has been quietly retired.
The competitive read
The A321neo and A321XLR are the direct beneficiaries of every quarter of MAX 10 delay. Airbus has used the delivery gap to lock down narrowbody share at carriers that had historically maintained Boeing-Airbus splits — including Delta and United themselves at the order-margin — and to capture LCC growth that might otherwise have gone to the larger MAX variant. The MAX 10 will still ship in volume once certified; the question is whether Boeing can rebuild credibility on schedule discipline fast enough to defend the back half of the book through 2030.
What to watch into year-end
Three items will determine whether the 2026 certification narrative holds. First, completion of the icing flight-test envelope without new findings. Second, FAA documentation closure on the engine anti-ice redesign, including any required service-bulletin scope for the in-service MAX 8 and MAX 9 fleets. Third, Boeing’s ability to maintain its current 38-per-month MAX production ceiling without supply-chain or quality-system regression. Any one of those slipping pushes the EIS narrative into late 2027 and reopens the question of whether MAX 10 holders will hold or convert.