Operators of Boeing 757 aircraft fitted with Aviation Partners winglets are conducting inspections after reports of cracks in some assemblies. The FAA issued an airworthiness directive requiring inspections within five days, following the discovery of cracks in five aircraft. The directive affects 156 U.S.-registered Boeing 757s, with international agencies like EASA adopting similar measures. The cracks were identified in the inspar lower wing skin area near access panel 543BB, associated with the winglet modification.
The investigation was prompted by a report of a crack on a Boeing 757-200 during maintenance. The cracks were in a part of the winglet system installed since 2016, following FAA and EASA certifications. Quick action by the supplier and regulators aims to prevent further structural issues. The inspections utilize high-frequency eddy current techniques to identify potential cracks, which could compromise safety if left unaddressed.
The FAA’s directive underscores the importance of routine checks in aircraft with retrofitted winglets, especially those with the scimitar-shaped tips. The affected fleet includes aircraft operated globally, with efforts underway to inspect and address the issue promptly, ensuring continued safety and compliance. The investigation continues as authorities monitor reports and inspection results to determine any additional measures needed.
