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Boeing's 777X resumes certification amid delays

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Boeing's 777X resumes certification amid delays
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Boeing 777X | Official Website

The Boeing 777X program has resumed certification testing after a five-month pause due to thrust link issues discovered during a test flight in Hawaii. The Federal Aviation Administration (FAA) had initially authorized certification flights in July of the previous year, but the process was delayed when technicians found severed and cracked thrust links on the test aircraft.

Boeing is now focused on achieving certification to ensure that the aircraft can enter service with launch customer Lufthansa by mid-2026. According to Boeing, "The certification flight testing will continue validating the airplane’s safety, reliability, and performance. We still have a long road ahead to ensure that we deliver the next generation of the world’s best-selling widebody to our customers next year, and we appreciate our regulator’s rigorous oversight."

Certification testing includes static testing, fatigue testing, material testing, performance evaluation under different conditions, stability assessments, stall behavior analysis, environmental performance tests in extreme weather conditions like icing and turbulence, system functionality checks for avionics and hydraulics under various scenarios, and thorough data review for FAA compliance.

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The four B777X test aircraft—registrations N779XW, N779XX, N779XY, and N779XZ—are actively involved in these processes. Each aircraft is at different stages of participation based on their specific testing requirements.

N779XX has been particularly active recently with extensive flights evaluating tropical climate performance from Curaçao International Airport. Meanwhile, other aircraft like N779XZ have not flown since November 2021 as part of their distinct roles within the overall program.

Looking forward to first deliveries slated for mid-2026 with Lufthansa hinges on avoiding further setbacks similar to past thrust link issues. Boeing currently reports 481 unfilled orders for its 777X model across multiple airlines including Emirates (205), Qatar Airways (94), Singapore Airlines (31), among others; however uncertainties remain about delivery timelines due especially given Emirates' skepticism regarding potential delays into late 2027 or even beyond.

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