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Boeing 777X Wins FAA Test Approval as Stock Trades Below Targets

Boeing received Federal Aviation Administration approval to begin Type Inspection Authorization Phase 4B certification flight testing for the 777X. The authorization marks a key step in the long-delayed widebody program’s path through the regulatory process.

June 10, 2026
2 min read
Source: Simply Wall St.
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Boeing (NYSE:BA) has received Federal Aviation Administration (FAA) approval to begin Type Inspection Authorization Phase 4B certification flight testing for the 777X. This authorization marks a key step in the long-delayed widebody program’s path through the regulatory process.

Details of the Action

Phase 4B certification involves a series of intensive flight tests to evaluate the aircraft’s performance and systems. The approval comes after years of delays due to technical and regulatory challenges.

Company's Position

Boeing has reiterated its commitment to working closely with the FAA to ensure all safety requirements are met. The company has not yet announced a specific timeline for completing the tests or beginning deliveries.

Precedents and Context

The 777X program has faced repeated delays since its launch in 2013, including issues with the engine and airframe. This approval comes as Boeing's stock trades below target levels.

Potential Financial Impact

Progress in certification could improve investor confidence in Boeing's ability to deliver the aircraft, potentially boosting the stock. However, cumulative costs from delays remain high.

Frequently Asked Questions

Phase 4B is an intensive flight testing phase to evaluate the aircraft's performance and systems as part of the certification process.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.