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The FAA has authorized Boeing to advance the 777-9 into the fourth phase of its certification process — a significant step forward for a widebody program that has been delayed more than six years and remains more than a year from entering commercial service. The Federal Aviation Administration cleared Boeing on Tuesday to advance the 777-9 into Phase 4A of its Type Inspection Authorization, moving the long-delayed widebody jet one stage closer to commercial certification, according to reports from The Air Current. The authorization covers the fourth of a standard five-phase TIA process. Boeing's chief financial officer had disclosed approval of Phase 3 at an investor meeting, Reuters reported, and the manufacturer is now permitted to run both phases simultaneously using separate test airframes — a concurrent testing approach that could compress the overall schedule. Phase 4 is divided into two parts, 4A and 4B, and the volume of testing required in this stage is equivalent to that of Phase 3. Phase 4 testing commenced in November. Boeing has built more than two dozen 777-9 airframes to date, though only four are designated for certification testing. Under the current timeline, the aircraft is not expected to enter commercial service until 2027. Even after all five TIA phases are completed, additional certification tests remain — tests that can only be conducted on delivery-ready aircraft. The Delay and Its Costs The 777-9's entry into service has now slipped more than six years beyond its original target, a protracted delay that has proved costly for both Boeing and the airlines waiting on the jet. Carriers that had planned to phase out older widebodies held onto them longer than intended — and in some cases brought retired aircraft back into service — to cover the capacity shortfall. Lufthansa Group CEO Carsten Spohr indicated earlier this month that the German carrier expects to become the first airline to receive the 777-9, with delivery anticipated around early 2027. Lufthansa holds an order for 20 aircraft and had originally planned to use the 777-9 to replace its Boeing 747-400 operations, citing the type's twin-engine efficiency and capacity comparable to the four-engine 747. With the 777-9 unavailable, Lufthansa returned previously retired Airbus A340, Boeing 747-400, and Airbus A380 aircraft to service to meet surging post-pandemic travel demand. The airline now plans to retire its 747-400 fleet by the end of the decade, with the 747-8 and A380 variants to follow by the early 2030s — a schedule contingent on 777-9 deliveries arriving as expected in 2027. Emirates, the Program's Largest Customer, Waits No carrier has more riding on the 777-9 than Emirates, which holds an order for 270 aircraft across the 777-8 and 777-9 variants. The Dubai-based carrier intends to use the jets to gradually replace its Airbus A380 fleet — the world's largest by operator — and the 777-9 represents the only currently available aircraft with a comparable passenger capacity. While the 777-9 remains uncertified, Emirates launched a multi-billion-dollar retrofit program to refresh the cabins on a large portion of its existing Boeing 777 and Airbus A380 fleet. The effort installed new interior products and expanded premium economy seating on older aircraft, allowing the airline to sustain its competitive positioning in premium travel markets while continuing to operate its current fleet. Although Emirates will not be the 777-9 launch customer, its order size and strategic importance to Boeing's widebody program make it certain to rank among the earliest recipients of the type once deliveries begin. Key Takeaways The FAA cleared Boeing on March 17 to advance the 777-9 into Phase 4A of its Type Inspection Authorization, allowing concurrent Phase 3 and Phase 4 testing on separate airframes. The 777-9 remains on track for a 2027 commercial entry into service, though additional certification tests on delivery-ready aircraft are still required after all five TIA phases are complete. Lufthansa, which holds an order for 20 aircraft, expects to be the first carrier to receive the 777-9 around early 2027; the airline returned retired widebodies to service to bridge the capacity gap caused by delays exceeding six years. Emirates, the program's largest customer with 270 aircraft on order, launched a multi-billion-dollar fleet retrofit program while awaiting delivery of the jets it plans to use to replace its Airbus A380 fleet.

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