Airworthiness Directive · Amendment 39-17473 · Rolls-Royce plc Turbojet Engines
Rolls-Royce plc Turbojet Engines
Superseded. A later AD replaced this one: AD 2016-03-03. Comply with the one in force.
This AD applies to all Rolls-Royce plc (RR) Viper Mk. 601-22 turbojet engines.
We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) Viper Mk. 601-22 turbojet engines. 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. We are issuing this AD to prevent failure of life-limited parts, damage to the engine, and damage to the airplane.
Unless already done, do the following actions.
(1) After the effective date of this AD, remove the following parts before they reach their specified new, lower, life limits: compressor shaft, part number (P/N) V900766: 20,720 flight cycles since new (CSN); compressor rear stubshaft (center bearing hub), P/Ns V900007 and V900994: 9,600 flight CSN; combustion chamber outer casing, P/Ns V950013 and V950331: 32,000 flight CSN.
(2) After the effective date of this AD, do not install any part identified in paragraph (e)(1) of this AD into any engine, nor return any engine to service with the parts identified in paragraph (e)(1) of this AD installed, if the part exceeds the new, lower, life limit specified in paragraph (e)(1) of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Engines
