EASA Regulations for Eurocopter BO-105

Failure of compressor adapter couplings in Rolls-Royce Corporation (RRC) Model 250-C20, -C20B, -C20F, -C20J, -C20S, -C20W and —B17 series turboprop and turboshaft engines

EASA Safety Information Bulletin (SIB) No. 2010-01R1 addresses the failure of compressor adapter couplings in Rolls-Royce Corporation Model 250-C20, -C20B, -C20F, -C20J, -C20S, -C20W, and -B17 series turboprop and turboshaft engines. These engines are installed on various helicopters including Agusta A109 series, Bell 206 series, Enstrom 480 series, Eurocopter AS355 and BO-105 series, MD Helicopters 369 series, Schweizer 269D, and fixed-wing aircraft such as the Britten-Norman BN-2T. The bulletin highlights safety concerns following multiple failures and related FAA Airworthiness Directive 2004-26-09.