GE9X Seal Fix Allows 777X Program to Stay on Track

Boeing's 777X program has hit another snag with the GE9X engine, but officials say it won't delay service entry. The issue involves a redesigned mid-seal for the engine, which connects its front and rear sections.

A crack in the seal was found in January 2026, prompting redesigns. Modified engines began shipping to Boeing in Q3 2026, allowing flight tests to continue uninterrupted.

The FAA is reviewing the updated component separately from current certification work, ensuring that Boeing can proceed with ETOPS testing without delay.

Despite six years of delays and $15 billion in charges, Boeing still aims to deliver its first 777-9 to Lufthansa in 2027. The GE9X engine, certified in 2020, delivers over 100,000 pounds of thrust and powers all 777X variants.