Airworthiness Directives; BMW Rolls-Royce GmbH Models BR700- 710A1-10 and BR700-710A2-20 Turbofan Engines

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-24-03 that was sent previously to all known U.S. owners and operators of BMW Rolls-Royce GmbH (BRR) Models BR700-710A1-10 and BR700-710A2-20 turbofan engines by individual letters. This AD requires repetitive visual inspections of the fairing and fasteners for correct installation and damage, and verification that the engine core fairing fasteners are torqued to the higher torque value. This amendment is prompted by a report of an engine compressor core fairing failure during engine ground runs. The actions specified by this AD are intended to prevent engine compressor or combustion core fairing detachment and damage to the engine bypass duct, resulting in engine failure and damage to the aircraft.