Airworthiness Directive · Amendment 39-17313 · Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 620-15 turbofan engines, serial numbers 17085, 17088, 17166, 17072, 17073, 17078, and 17079.
We are adopting a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Tay 620-15 turbofan engines. This AD requires a one-time inspection of the low-pressure compressor (LPC) fan blades and if erosion is found their replacement before further flight. This AD was prompted by evidence of excessive leading edge erosion of the LPC fan blades on certain Tay 620-15 engines. We are issuing this AD to prevent failure of the LPC fan blade, which could result in uncontained engine failure and damage to the airplane.
Unless already done, do the following.
(1) Before the next flight after the effective date of the AD, inspect the leading edge of the LPC fan blades and determine if excessive erosion is evident. Guidance on conducting the inspection can be found in RRD Alert Non-Modification Service Bulletin (NMSB) TAY-72-A1777, dated October 26, 2012.
(2) If the measured blade chordal width is outside the requirements, before the next flight, replace the complete set of LPC fan blades with a set of LPC fan blades eligible for installation.
(3) Within 30 days after performing the inspection required by paragraph (e)(1) of this AD, provide, for all repaired blades, the actual chordal width measurement to RRD, Service Engineering.
For any reporting requirement in this AD, a federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 2120-0056. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave. SW., Washington, DC 20591, Attn: Information Collection Clearance Officer, AES-200.
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
