EASA AD No.: 2012-0161

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EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2012-0161

Date: 24 August 2012 

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 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 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 Deutschland Ltd & Co KG 

Type/Model designation(s): 

BR700-710 series, all models

TCDS Number: EASA.E.018 

Foreign AD: Not applicable 

Supersedure: None 

ATA 72 Engine – Accessory Gearbox Module – Replacement of the Fuel 

Pump Splined Coupling 

Manufacturer(s): Rolls-Royce Deutschland Ltd & Co KG (RRD) 

Applicability: BR700-710A1-10 and BR700-710A2-20 engines, all manufacturer serial 

numbers. 

BR700-710C4-11 engines, all manufacturer serial numbers which: 

(a) have hardware configuration standard 710C4-11 engraved on the 

engine data plate (RRD Service Bulletin (SB) SB-BR700-72-101466 

standard not incorporated), or 

(b) have hardware configuration standard 710C4-11/10 engraved on the 

engine data plate (RRD SB SB-BR700-72-101466 standard 

incorporated). 

These engines are known to be installed on, but not limited to, Gulfstream GV, 

GV-SP (G500, G550) and Bombardier BD-700-1A10, BD-700-1A11 series 

aeroplanes. 

Reason: In-service experience of RRD BR700-710 fuel pump installed on the rear face 

of the accessory gearbox identified premature wear of the splined coupling, 

which caused damage to the splined coupling. 

This condition, if not corrected, could lead to failure of engine fuel supply, likely 

resulting in an uncommanded in-flight shut down and consequent reduced 

control of the aeroplane. 

To address this potential unsafe condition, RRD issued Alert Non-Modification 

Service Bulletin (NMSB) BR700-72-A900509, providing instructions to replace 
EASA AD No.: 2012-0161

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the affected fuel pump splined couplings. 

For the reasons described above, this AD introduces a mandatory replacement 

interval for the affected fuel pump splined couplings. 

Effective Date: 07 September 2012 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Initially, within the compliance time as specified in Table 1 of this AD, as 

applicable, and, thereafter, at intervals not to exceed 4 000 engine hours 

(EH), replace each engine fuel pump splined coupling with a serviceable 

part in accordance with the instructions of RRD NMSB-BR700-72-A900509 

at Revision 2. 

Table 1 Initial replacement thresholds 

EH accumulated since new, on 

the effective date of this AD 

Compliance time 

Equal to or more than 3 750 EH 250 EH after the effective 

date of this AD 

Less than 3 750 EH Before exceeding 4 000 EH 

(2) Fuel coupling replacements, accomplished before the effective date of this 

AD in accordance with the instructions of RRD NMSB-BR700-72-A900509 

at original issue or Revision 1, are acceptable to comply with the initial 

requirements of this AD. After the effective date of this AD, the instructions 

of RRD NMSB-BR700-72-A900509 at Revision 2 (or later approved 

revision) must be used. 

(3) From the effective date of this AD do not install a fuel pump with an 

affected splined coupling on an engine, or an engine with an affected fuel 

pump splined coupling installed, on an aeroplane, unless in accordance 

with the requirements of this AD. 

(4) Compliance with the requirements of paragraphs (1) and (3) of this AD can 

be demonstrated by: 

(4.1) Revising as follows, unless accomplished previously, the approved 

Aircraft Maintenance Programme (AMP) on the basis of which the 

operator or the owner ensures the continuing airworthiness of each 

operated aeroplane: 

 Incorporate the fuel pump splined coupling 4 000 EH replacement 

interval as specified in RRD Alert NMSB SB-72-A900509 Revision 2,

 and 

(4.2) Complying with the approved AMP as described in paragraph (4.1) 

of this AD. 

Ref. Publications: RRD Alert NMSB-BR700-72-A900509 Revision 2 dated 17 July 2012. 

The use of later approved revisions of this document is acceptable for 

compliance with the requirements of this AD. 

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

Alternative Methods of Compliance for this AD. 

2. This AD was posted on 23 July 2012 as PAD 12-086 for consultation until 

20 August 2012. The Comment Response Document can be found at 

http://ad.easa.europa.eu. 

3. Enquiries regarding this AD should be referred to the Safety Information 
EASA AD No.: 2012-0161

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

4. For any question concerning the technical content of the requirements in 

this AD, please contact: 

Tel.: +49 (0) 33708 6 1200, Fax: +49 (0) 33708 6 1212.