EASA Regulations for Sikorsky S76A

FAA SAIB NE-06-52 - Rolls-Royce Corporation 250-C30, -C40 and -C47 series Engines Combustor Liners

EASA Safety Information Notice 2007-02 is an informational bulletin addressing issues with combustor liners in Rolls-Royce Corporation 250-C30, -C40, and -C47 series engines. These engines are installed in helicopters including Bell models 206, 230, 407, and 430; MD Helicopter models 369F, 369FF, and 600; and Sikorsky model S76A. The notice highlights concerns about the use of an unapproved material, Hastelloy X, in combustor liner mixing cups, which may affect engine performance.