PRODUCT: All Rolls-Royce plc (RR) Viper Mk. 601-22 turbojet engines. SUBJECT: Airworthiness Directive 2013-11-13 ACTION: Final Rule
SUMMARY: This AD requires reducing the life of certain critical parts. This AD was prompted by a review carried out by RR of the lives of these parts. The FAA is issuing this AD to prevent failure of life-limited parts, damage to the engine, and damage to the airplane.