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Fri, Feb 06, 2015

AD: Rolls-Royce Corporation Turboprop And Turboshaft Engines

AD NUMBER: 2015-02-22

PRODUCT: Certain Rolls-Royce Corporation (RRC) 250-C20, -C20B, and -C20R/2 turboshaft engines.

ACTION: Final Rule

SUMMARY: The FAA is superseding airworthiness directive (AD) 2012-14-06 for the product listed above.

AD 2012-14-06 required a one-time visual inspection and fluorescent-penetrant inspection (FPI) on certain 3rd-stage and 4th-stage turbine wheels for cracks in the turbine blades.

This new AD replaces the one-time visual inspection and FPI with repetitive visual inspections and FPIs. This AD also adds certain engine models to the applicability. This AD was prompted by the determination that the one-time inspections required by AD 2012-14-06 should be changed to repetitive inspections.

The FAA is issuing this AD to prevent failure of 3rd-stage and 4th-stage turbine wheel blades, which could cause engine failure and damage to the aircraft.

DATES: This AD is effective March 9, 2015.

FMI: AD

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