Boeing nears approval of 737 MAX anti-ice fix, clearing path for deliveries

• Boeing has approximately 30 MAX 7s and nine MAX 10s already built awaiting delivery, with the MAX 10 representing at least 28% of outstanding MAX orders and now 98% through certification flight testing
• The anti-ice system redesign addresses potential engine overheating issues discovered in 2021; existing MAX aircraft will require retrofits that can mostly be done during maintenance shifts, though new wiring installation is more invasive
• Certification is years behind schedule due to stricter oversight following the 2018-2019 crashes that killed 346 people and the January 2024 Alaska Airlines cabin panel blowout, allowing Airbus to expand its narrowbody market lead

Boeing Nears Approval of 737 MAX Anti-Ice Fix

Boeing is approaching final regulatory certification for an engine anti-ice system fix on its 737 MAX jetliner, clearing the path for delayed MAX 7 and MAX 10 variants to enter service. The redesign addresses potential overheating and engine failure issues that have been the primary obstacle to certification.

Key Developments

Boeing has approximately 30 MAX 7s and nine MAX 10s already built and awaiting delivery. The MAX 10, which represents at least 28% of outstanding MAX orders, is 98% through certification flight testing with just two tests remaining. The FAA indicated potential MAX 7 certification this summer, with Southwest Airlines being the largest customer for that version.

Market Impact

Certification delays, now years behind schedule, have allowed Airbus to expand its lead in the narrowbody aircraft market. Boeing faces heightened scrutiny following two fatal MAX 8 crashes in 2018-2019 and the January 2024 Alaska Airlines cabin panel blowout on a MAX 9.

Technical Details

The anti-ice fix, developed for CFM International's LEAP-1B engines (a GE Aerospace-Safran joint venture), also reduces engine noise and mitigates fan flutter. Existing MAX fleets will require retrofitting, with most work completable within a maintenance shift, though new wiring installation is more complex. Airlines can schedule repairs during routine heavy maintenance checks to minimize disruption.

The MAX 10 will feature an enhanced angle-of-attack system addressing issues from the fatal crashes that killed 346 people. All in-service MAX jets will receive this update within two years of certification.

Additionally, Boeing's 777-9 widebody is over 50% through certification testing and remains on track for deliveries next year.