EASA AD No.: 2012-0039R1

EASA Form 110 Page 1/2

EASA AIRWORTHINESS DIRECTIVE

AD No.: 2012-0039R1

Date: 14 March 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].

Type Approval Holder’s Name :

Rolls-Royce Deutschland Ltd & Co KG

Type/Model designation(s) :

Tay 611-8 and 611-8C engines

TCDS Number: EASA.E.063

Foreign AD: Not applicable

Revision: This AD revises EASA Emergency AD 2012-0039-E dated 09 March 2012.

ATA 72 Engine – Stage 2 High Pressure Turbine Disc Spanner Retaining 

Nut – Replacement

Manufacturer(s): Rolls-Royce Deutschland Ltd & Co KG, Rolls-Royce plc.

Applicability: TAY 611-8 engines, serial numbers (s/n) 16870, 16879, 16880, 16897, 

18046, 18051, 18052, 18053, 18058, 18065, 18066, 18169 and 18194

TAY 611-8C engine, s/n 85313.

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

Aerospace G-IV, GIV-SP and GIV-X aeroplanes.

Reason: A recent quality investigation by Rolls-Royce Deutschland (RRD) has 

identified that certain Stage 2 High Pressure Turbine (HPT) disc spanner 

retaining nuts did not receive the proper heat treatment after application of 

silver plating.

This condition, if not corrected, could result in a Stage 2 HPT disc failure, 

possibly leading to release of high energy debris, resulting in damage to the 

aeroplane and/or injury to occupants.

For the reason described above, EASA issued Emergency AD 2012-0039-E 

to require the removal from service of the 14 affected engines.

This AD has been revised to confirm that approved instructions for corrective 

action are now available, accomplishment of which will allow these engines 

to be released back into service.

Effective Date: Revision 1: 14 March 2012

Original issue: 09 March 2012
EASA AD No.: 2012-0039R1

EASA Form 110 Page 2/2

Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) Within 20 flight cycles (FC), or within 200 FC after the latest engine shop 

visit, whichever occurs first after 09 March 2012 [the effective date of the 

original issue of this AD], remove the engine from the aeroplane.

(2) From 09 March 2012 [the effective date of the original issue of this AD], 

do not install an engine, identified by s/n in the Applicability section of 

this AD, on an aeroplane, unless the affected HPT disc spanner 

retaining nut, Part Number (P/N) EU52005, on that engine has been 

replaced with a serviceable P/N EU52005 nut, in accordance with the 

instructions of RRD Alert Non-Modification Service Bulletin (NMSB) 

TAY-72-A1769.

Ref. Publications: RRD Alert NMSB TAY-72-A1769 dated 09 March 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. The required actions and the risk allowance have granted the issuance 

of a Final AD with Request for Comments, postponing the public 

consultation process 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 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.