Superseded. This AD was superseded by AD 2022-10-06. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2017-18-14
Effective 10/13/2017 · Published 09/08/2017
Airworthiness Directives; Rolls-Royce Corporation Turboshaft Engines
Summary
We are superseding Airworthiness Directive (AD) 2015-02-22 for certain Rolls-Royce Corporation (RRC) model 250 turboprop and turboshaft engines. AD 2015-02-22 required repetitive visual inspections and fluorescent-penetrant inspection (FPIs) on certain 3rd- stage and 4th-stage turbine wheels for cracks in the turbine wheel blades. This AD requires repetitive visual inspections and FPIs of 3rd- stage turbine wheels w…