Complex Made Simple

No reports of lap join cracks for Boeing’s 777

Boeing has said there have been no reports of lap joint fatigue cracks in sections 41, 43 and 44 of the in-service Boeing 777-200 and -300 fleet, though it agrees with a new US Federal Aviation Administration airworthiness directive aimed at detecting potential cracks in those areas with repetitive ultrasonic inspections, Flightglobal.com has reported. The cracks were detected during full-scale fatigue testing of a 777 airframe at Boeing, not in the active fleet, Boeing said.