EASA AD No.: 2010-0076

EASA Form 110 Page 1/3 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2010-0076

Date: 20 April 2010

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

This AD is issued in accordance with EC 1702/2003, Part 21A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall b e ensured by accomplishing any applicable ADs. Cons equently, no person may operate an aircraft to which an Airworthiness D irective applies, except in accordance with the req uirements of that Airworthiness Directive 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, Ar ticle 14(4) exemption].


### Type Approval Holder’s Name :
Rolls-Royce Deutschland Ltd & Co KG Type/Model designation(s) :

BR700-710 engines

TCDS Number : EASA.E.018

Foreign AD : Not applicable

Supersedure : Not applicable



### ATA 72 Engine – High Pressure (HP) Turbine Discs Stage 1 a nd 2

Assembly Life Limits – Modification

Manufacturer(s): Rolls-Royce Deutschland Ltd & Co K G

Applicability: All BR700-710C4-11 model engines whi ch have hardware configuration standard 710C4-11/10 engraved on the engine data pl ate (Service Bulletin SB-BR700-72-101466 standard incorporated) and if eq uipped with HP Turbine Discs stage 1 or 2 listed in Table 1 or Tab le 2 of this AD. These engines are known to be installed on, but not limited to Gulfstream GV-SP (G500, G550) aeroplanes.

Reason: Due to manufacturing problems of BR700-710 HP Stage 1 and 2 Turbine Discs it was necessary to re-calculate the Declared Safe Cyclic Life (DSCL) for all BR700-710 HP Turbine Discs. The anal ysis concluded that it is required to reduce the approved life limits for the HP Turbine Disc Part Numbers (P/N) that are listed in Table 1 and Table 2 of this AD. Exceeding the revised approved life limits could po tentially result in noncontained disc failure. This AD requires compliance with the new life limit s for replacement of the affected HP Stage 1 and 2 Turbine Discs, as necessa ry (at a cyclic life that is lower than the one currently applicable in the T ime Limits Manuals) and introduction of the new DSCL into the applicable ai rcraft maintenance programme. The revised DSCL are given in the Rolls- Royce Deutschland Alert Non-Modification Service Bulletin (NMSB) SB-B R700-72-A900492 initial issue.EASA AD No.: 2010-0076

EASA Form 110 Page 2/3 Effective Date: 04 May 2010

Required action(s) and Compliance Time(s): Required as indicated, unless accomplished previous ly: (1) Within one month after the effective date of th is AD or upon accumulating the new DSCL indicated in Table 1 or 2 of this AD, whichever occurs later, and thereafter, at interval s not to exceed the new DSCL, replace the HP1 Turbine Disc or the HP2 T urbine Disc, as of applicable, with a serviceable HP1 Turbine Di sc or the HP2 Turbine Disc, as applicable, in accordance with Rol ls-Royce Deutschland. NMSB SB-BR700-72-A900492 initial issue

. (2) Compliance with the requirements of paragraph ( 1) of this AD can be demonstrated by: (2.1) Revising as follows, unless accomplished prev iously, the approved Aircraft Maintenance Programme from which the Operator or the Owner ensures the continuing airwor thiness of each operated aeroplane: Incorporate the new DSCL and associated aircraft airworthiness limitations specified in the Rolls-Ro yce Deutschland. NMSB SB-BR700-72-A900492 initial issue

. and (2.2) Complying with the approved Aircraft Maintena nce Programme as described in paragraph (2.1) of this AD. (3) After the effective date of this AD, do not ins tall any HP1 Turbine Disc or HP2 Turbine Disc unless in compliance with paragraph (1) of this AD.

Ref. Publications: Supplementary Time Limits Manual (TLM) T-710-5BR. Rolls-Royce Deutschland Alert NMSB-BR700-72-A900492 initial issue. The use of later approved revisions of these docume nts 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. The required actions and the risk allowance have granted the issuance of a Final AD with Request for Comments, p ostponing the public consultation process after publication. 3. Enquiries regarding this AD should be referred t o the Airworthiness Directives, Safety Management & Research Section, C ertification 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 ; Fax: +49 (0) 33 7086 3356 E-mail: rrd.aog@rolls-royce.com



### .EASA AD No.: 2010-0076

EASA Form 110 Page 3/3 Table1:

Table 2: Component Part

Number Engine

Variant Declared

Safe Cyclic Life (Flight Cycles)

BRR23952 BR700-710C4-

11 3 800 HP1 Turbine Disc BRR23953 BR700-710C4- 11 3 800

Component Part

Number Engine

Variant Declared

Safe Cyclic Life (Flight Cycles)

BRR22008 BR700-710C4-

11 3 700 HP2 Turbine Disc BRR22009 BR700-710C4- 11 3 700