Boeing has resumed flight testing of the 777X after addressing thrust link issues discovered within its test fleet. With the problems resolved, the 777X is back in the air.
777X Back in Action
On January 16, 2025, the 777X resumed its flight tests. The aircraft, registered as N779XY, took off from King County International Airport (BFI) at 2:12 PM local time. After flying over Washington and Oregon, it successfully landed back at King County/Boeing Field at 4:18 PM.
This flight marks a significant milestone in Boeing’s efforts to overcome the challenges that led to the suspension of 777X flight tests in September 2024 due to thrust link issues uncovered during scheduled maintenance.
The Root Cause and Resolution
Boeing engineers identified broken thrust links in August 2024. These components are critical structural elements connecting the engine to the aircraft. Each 777-9 model is equipped with two thrust links, designed for system redundancy.
The company replaced the faulty parts and implemented necessary improvements on four aircraft in the test fleet. A Boeing spokesperson noted that lessons learned from this issue would contribute to future aircraft designs.
Boeing’s Goals for 2025
Following a challenging 2024, Boeing is positioning 2025 as a year of recovery and progress. The company aims to complete certification processes for the 737 MAX 7, 737 MAX 10, and 777X, fulfilling its commitments to customers.
Former CEO David Calhoun highlighted in Boeing’s final 2024 earnings report that a solution had been found for the engine anti-ice (EAI) system issue in the 737 MAX models. This updated system is set for implementation in 2025, paving the way for the certification and delivery of the 737 MAX 7 and 737 MAX 10 models.
777X’s Entry into Commercial Service
Boeing previously delayed the entry into service (EIS) of the 777X from 2020 to 2026. The company continues to advance toward this goal with renewed flight tests and engineering improvements, keeping the timeline on track.
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