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Boeing Gets FAA Nod for Key 777X Certification Testing Phase

Boeing (BA) announced that the Federal Aviation Administration has approved the start of TIA Phase 4B certification testing for its 777X aircraft. This milestone brings the widebody jet closer to type certification after multiple delays.

June 8, 2026
2 min read
Source: MT Newswires
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Boeing (BA) has received approval from the Federal Aviation Administration to begin TIA Phase 4B certification testing for its 777X aircraft, according to media reports. The approval marks a critical step toward obtaining type certification for the widebody jet, which has faced repeated delays.

Details of the Action

TIA Phase 4B is the final flight testing phase required before type certification. It involves rigorous tests of the aircraft's systems and performance under various conditions. Boeing has not provided a specific timeline for completing this phase or obtaining final certification.

Company's Position

Boeing welcomed the approval, viewing it as confirmation of progress in the 777X program. The company stated it will work closely with the FAA to complete the tests safely and efficiently.

Precedents and Context

The 777X program has faced multiple delays since its launch due to technical and regulatory issues, as well as increased regulatory scrutiny following the two 737 MAX crashes. Initially expected to enter service in 2020, it has been pushed back to at least 2025.

Potential Financial Impact

Certification of the 777X is vital for Boeing to strengthen its position in the widebody market and compete with Airbus's A350. Success could improve cash flow and help reduce debt. Any further delays may increase costs and affect customer orders.

Frequently Asked Questions

It is the final flight testing phase required before type certification for the Boeing 777X, involving rigorous tests of the aircraft's systems and performance.

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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.