Boeing is conducting flight tests for its new 777 series commercial jets for the first time in five months, according to multiple reports. The tests were suspended last summer when structural defects were found on the four 777X aircraft being used to gain certification for the updated widebody aircraft.
During a test flight in August 2024, Boeing discovered “severed thrust links” – structural elements connecting engines and airframes. Two thrust links are installed between the wing and each of the aircraft’s two engines. According to Boeing, the problem was discovered following a test flight from Hawaii to Everett, Wash., and reportedly the same issue was identified on other 777X aircraft following test flights.
“During scheduled maintenance, we identified a component that did not perform as designed,” according to a Boeing spokesperson at the time. “Our team is replacing the part and capturing any learnings from the component and will resume flight testing when ready.”
The Boeing 777X is a twin-engine, widebody aircraft that updates the current 777 series to offer greater flight range and higher seating capacity, with a wider span for its composite wing structures and folding wing tips to ensure the jets can service current airport facilities. Boeing has promoted the 777X as “the world’s largest and most efficient twin-engine jet”.
Boeing has landed more than 500 firm orders and over 100 options for the 777X, which will be offered in three variants, including a freighter model.
The new 777 was introduced more than a decade ago, with delivery first set for 2020. That date was postponed to 2022 due to certification requirements and delays in flight testing. The date was later set to 2024 and 2025, and when the pause was called last August Boeing rescheduled the date to 2026, which continues to be the target.
The 777X is one of three new aircraft Boeing hopes to have pass airworthiness certification in 2025, along with the 737 MAX 7 and MAX 10. As it is centered in Everett, the 777 program was impacted by striking International Assn. of Machinist workers during September and October 2024.
