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Boeing 777-9 flight testing could extend into 2027 as GE9X work delays ETOPS certification

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Boeing says additional work on GE Aerospace’s GE9X engine has delayed the start of ETOPS certification testing for the 777-9, raising the possibility that part of the aircraft’s flight-test campaign will continue into 2027 and further shifting the program’s certification timeline.

Discovered 2026-09-16T23:45:37.954525-07:00 | 2026-09-16T23:45:37.954525-07:00

Briefing

What Hype is tracking

  • A flight-test campaign extending into 2027 would signal additional schedule pressure for the 777-9, with potential implications for certification planning and airline fleet timelines.
  • The delay is tied to GE9X engine work and ETOPS certification testing, underscoring how propulsion readiness remains a critical path for long-range twin-engine aircraft programs.

Reported By

aero.de Air Data News
Sources Tracked
2
First Seen
2026-09-16T23:45:37.954525-07:00
Latest Update
2026-09-17T00:05:11.327936-07:00
Coverage
Aviation

Sources

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