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FAA approves Boeing 777X TIA Phase 4B as Boeing targets late-2027 777-9 deliveries

Boeing says the FAA has approved TIA Phase 4B, clearing the next stage of flight-testing toward 777-9 type certification. Cathay Pacific—holding 35 777-9s—expects deliveries to begin in late 2027, while Boeing leadership frames the milestone as progress that can improve the program’s cash-flow outlook.

Discovered 2026-06-07T05:11:29.419882-07:00 | 2026-06-07T05:11:29.419882-07:00

Briefing

What Hype is tracking

  • The FAA’s approval to proceed with TIA Phase 4B is a concrete step in the 777X certification path, reducing technical uncertainty after earlier test authorizations such as FAA Phase 4A (source:1e63990c-2f3b-4018-bc17-ab4b9afd3726).
  • Timelines shift from engineering risk toward delivery planning: Cathay’s 777-9 expectation for late-2027 start anchors fleet decision-making for a launch-order customer holding 35 aircraft.
  • The milestone also feeds the financial narrative—Boeing links certification progress to its cash-flow outlook—making test throughput and certification sequencing a direct driver of program economics.

Reported By

aeroxplorer.com Simple Flying Dj's Aviation FlightGlobal AINonline Aviation A2Z
Sources Tracked
13
First Seen
2026-06-07T05:11:29.419882-07:00
Latest Update
2026-06-09T20:03:25.292114-07:00
Coverage
Aviation

Sources

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