FAA Proposes Rolls-Royce 250 Airworthiness Directive

The FAA proposes to supersede AD 2012-14-06, which applies to certain Rolls-Royce 250-C20, - C20B, and -C20R/2 turboshaft engines. The current AD requires a one-time visual inspection and fluorescent-penetrant inspection on certain third- and fourth-stage turbine wheels for cracks in the turbine blades. Since the FAA issued AD 2012-14-06, it has determined that the one-time inspection required by AD 2012-14-06 should be changed to repetitive inspections and add an inspection after any engine hot start. The proposed AD would prevent failure of third- and fourth-stage turbine wheel blades, which could cause engine failure.