EASA AD No.: 2012-0204

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 1/2 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2012-0204

Date: 01 October 2012

Note: This Airworthiness Directive (AD) is issued b y EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the European Communit y, its Member States and of the European third countries that participate in the ac tivities of EASA under Article 66 of that Regulation.

This AD is issued in accordance with EU 748/2012, P art 21.A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be en sured by accomplishing any applicable ADs. Conseque ntly, no person may operate an aircraft to which an AD applies, except in accordan ce with the requirements of that AD, unless otherwi se specified by the Agency [EC 2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, A rticle 14(4) exemption].


### Design Approval Holder’s Name: Rolls-Royce Deutschland Ltd & Co KG Type/Model designation(s): Tay 620-15 and Tay 650-15 series engines

TCDS Number: EASA.E.063

Foreign AD: Not applicable

Supersedure: None



### ATA 72 Engine – Low Pressure Compressor Disc Assembly Life Limitation – Implementation

Manufacturer(s): Rolls-Royce Deutschland Ltd & Co K G (RRD), formerly Rolls-Royce plc

Applicability: Tay 620-15, Tay 620-15/20, Tay 650-1 5 and Tay 650-15/10 engines, all serial numbers These engines are known to be installed on, but not limited to, Fokker F28 Mark 0070 and F28 Mark 0100 series aeroplanes .

Reason: The Tay 650-15 and Tay 650-15/10 engine Tim e Limits Manual Chapter 05-10- 01 contains maximum approved life limitations, iden tified as Declared Safe Cyclic Life (DSCL) for Low Pressure Compressor (LPC ) rotor disc assemblies Part Number (P/N) JR31198A and P/N JR34563A operate d to the Plan D Flight Mission, which has been recalculated to a lower val ue. Decreased DSCL of LPC rotor disc assemblies P/N JR3 1198A and P/N JR34563A may affect these disc assemblies installed in Tay 650-15 and Tay 650-15/10 engines as well as in Tay 620-15 and Tay 620-15/20 engines.
Failure to take decreased DSCL of affected LPC roto r disc assemblies into account could lead to affected part failure and con sequent release of high energy debris potentially resulting in damage to, a nd/or reduced control of, the aeroplane. To address this potential unsafe condition, RRD iss ued Alert Non-Modification Service Bulletin (NMSB) Tay-72-A1772 to reduce the DSCL from 20 000 engine flight cycles (EFC) to 18 700 EFC and to cor rect the consumed life of LPC rotor disc assemblies P/N JR31198A and P/N JR34 563A which were previously operated in Tay 650-15 or Tay 650-15/10 engines Plan D Flight Mission and are currently installed in Tay 620-15, Tay 620-15/20, Tay 650-15EASA AD No.: 2012-0204

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 2/2 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. or Tay 650-15/10 engines. For the reasons described above, this AD requires t he implementation of more restrictive life limits for the affected parts.

Effective Date: 15 October 2012

Required Action(s) and Compliance Time(s): Required as indicated, unless accomplished previous ly: (1) Within 30 days after the effective date of this AD, identify the P/N of LPC rotor disc assembly installed in the engine. (2) If, as a result of the identification as requir ed by paragraph (1) of this AD, it is established that an LPC rotor disc assembly P/N JR31198A or P/N JR34563A is installed in an engine, before next fli ght, for an assembly which was previously operated in a Tay 650-15 or Ta y 650-15/10 engine to the Plan D Flight Mission, correct the consumed lif e based on new DSCL value of 18 700 EFC in accordance with the Time Lim its Manual, Chapter 05-10-01, TASK 05-10-01-800-000. (3) After the effective date of this AD, to allow o peration of an engine to the Plan D Flight Mission, before exceeding 18 700 EFC by the P/N JR31198A or P/N JR34563A LPC rotor disc assembly, replace th e affected LPC rotor disc assembly with a serviceable part. (4) Compliance with the requirements of paragraphs (2) and (3) of this AD can be demonstrated by: (4.1) Revising as follows the approved Aircraft Mai ntenance Programme (AMP) on the basis of which the operator or the own er ensures the continuing airworthiness of each operated aeroplane : Incorporate the applicable airworthiness limitatio ns as specified in RRD Alert NMSB TAY-72-A1772,
and (4.2) Complying with the approved AMP described in paragraph (4.1) of this AD.

Ref. Publications: RRD Alert NMSB TAY-72-A1772 init ial issue, dated 9 August 2012. The use of later approved revisions of this documen t is acceptable for compliance with the requirements of this AD.

Remarks: 1. If requested and appropriately substantiated, EA SA can approve Alternative Methods of Compliance for this AD. 2. This AD was posted on 21 August 2012 as PAD 12-1 11 for consultation until 19 September 2012. The Comment Response Docum ent can be found at http://ad.easa.europa.eu

. 3. Enquiries regarding this AD should be referred t o the Safety Information Section, Executive Directorate, EASA. E-mail: ADs@easa.europa.eu

. 4. For any question concerning the technical conten t of the requirements in this AD, please contact: Rolls-Royce Deutschland Ltd & Co KG Eschenweg 11 – 15827 Dahlewitz – Germany Phone: +49 (0) 33 7086 1768 ; +49 (0) 33 7086 3356.