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FAA Clears Boeing 777X for TIA Phase 4B Testing

June 8, 2026

2 min read

Key Takeaways

FAA clears Boeing to start TIA Phase 4B testing on 777X.
Testing marks progress in type certification efforts.
777X certification has been delayed.
TIA Phase 4B is a critical step in the certification process.

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Strategic Implications

This clearance may indicate the FAA's confidence in Boeing's progress towards certification. The 777X program's advancement suggests that Boeing could be nearing the end of its certification journey, which may have implications for the company's competitiveness in the commercial aviation market.

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What Happened

Regulatory Milestone Advances Certification Process

The Federal Aviation Administration (FAA) has given Boeing the green light to begin TIA Phase 4B testing on the 777X airliner, a significant milestone in the aircraft’s delayed type certification process. This development marks progress in Boeing’s efforts to complete the certification, which has been hindered by various issues. The 777X is a critical program for Boeing, and its certification is eagerly anticipated by the aviation industry. This news was first reported by Aviation International News.

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