EASA AD No.: 2013-0246

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EASA AIRWORTHINESS DIRECTIVE

AD No.: 2013-0246

Date: 10 October 2013

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation 

(EC) No 216/2008 on behalf of the European Community, its Member States and of the 

European third countries that participate in the activities of EASA under Article 66 of that 

Regulation.

This AD is issued in accordance with EU 748/2012, Part 21.A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the 

continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may operate an 

aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise 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, Article 14(4) exemption].

Design Approval Holder’s Name:

ROLLS-ROYCE plc

Type/Model designation(s):

RB211-524 engines

TCDS Numbers: United Kingdom 1046 and 1048

Foreign AD: Not applicable

Supersedure: None

ATA 72 Engine – High Pressure Compressor Rotor Stage 1 and 2 Discs –

Reduction of Cyclic Life Limit

Manufacturer(s): Rolls-Royce plc

Applicability: RB211-524G2-19, RB211-524G3-19, RB211-524H-36 and RB211-524H2-19

engines, all serial numbers.

These engines are known to be installed on, but not limited to, Boeing 747 and 

767 series aeroplanes.

Reason: Rolls-Royce recently reviewed the cyclic lives of critical parts of the RB211-524 

series engines, which has resulted in the identification of a reduced cyclic life 

limit for certain high-pressure compressor (HPC) Rotor Stage 1 and 2 Discs.

Operation of critical parts beyond these reduced cyclic life limits could lead to 

part failure and consequent release of high-energy debris, possibly resulting in 

damage to the aeroplane and/or injury to the occupants.

For the reasons described above, this AD requires replacement of those discs

that have already exceeded the reduced cyclic life limit and replacement of all 

other affected discs before the reduced life limit is exceeded. In addition, this 

AD requires implementation of the reduced cyclic life limit for the affected HPC 

Rotor Stage 1 and 2 Discs.

Effective Date: 17 October 2013
EASA AD No.: 2013-0246

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Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) Within 30 days after the effective date of this AD, determine the Part 

Number (P/N) of the HPC Rotor Stage 1 and 2 Discs installed on the 

engines and the accumulated flight cycles (FC) since new for each HPC 

Rotor Stage 1 and 2 Disc.

Table 1 – P/Ns of affected HPC Rotor Stage 1 and 2 Discs

LK70608 UL19877 UL24023

LK76030 UL19878

LK86621 UL19879

(2) If, as a result of the determination as required by paragraph (1) of this AD,

a disc is installed with a P/N as listed in Table 1 of this AD, before the 

accumulated cyclic life exceeds 7 390 FC since new, or within 25 FC after 

the effective date of this AD, whichever occurs later, replace the affected 

disc with a serviceable HPC Rotor Stage 1 or 2 Disc, as applicable.

Note: For the purpose of this AD, a serviceable HPC Rotor Stage 1 or 2 Disc is 

one having a P/N as listed in table 1 of this AD with a total accumulated cyclic 

life less than 7 390 FC since new, or a HPC Rotor Stage 1 or 2 Disc with 

another P/N.

(3) From the effective date of this AD, each HPC Rotor Stage 1 and Stage 2 

Disc having a P/N as listed in Table 1 of this AD must be replaced with a 

serviceable HPC Rotor Stage 1 or 2 Disc, as applicable, before exceeding

7 390 FC since new.

Ref. Publications: None.

Remarks: 1. If requested and appropriately substantiated, EASA can approve 

Alternative Methods of Compliance for this AD.

2. Based on the required actions and the compliance time, EASA have 

decided to issue a Final AD with Request for Comments, postponing the 

public consultation process until after publication.

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Executive Directorate, EASA. E-mail: ADs@easa.europa.eu.

4. For any question concerning the technical content of the requirement in this 

AD, please contact your designated Rolls-Royce representative, or 

download the publication from your Aeromanager account at 

www.aeromanager.com, or contact at Rolls-Royce plc. Corporate 

Communications, P.O. Box 31, Derby, DE24 8BJ, United Kingdom,

telephone: +44 (0) 1332 242424, or send an e-mail through 

http://www.rolls-royce.com/contact/civil_team.jsp, identifying the 

correspondence as being related to Airworthiness Directives.