EASA AD No.: 2013-0086

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EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2013-0086

Date: 09 April 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 Deutschland Ltd & Co KG 

Type/Model designation(s): 

Tay 650-15 and Tay 650-15/10 series 

engines 

TCDS Number: EASA.E.063 

Foreign AD: Not applicable 

Supersedure: None 

ATA 75 Air – Air Control Regulator and Actuator / High Pressure Air Bleed 

Valve / Operating Mechanism – Inspection 

Manufacturer(s): Rolls-Royce plc 

Applicability: Tay 650-15 and Tay 650-15/10 engines, all serial numbers. 

These engines are known to be installed on, but not limited to, Fokker F28 

Mark 0100 aeroplanes. 

Reason: A review of the service history of Tay engines discovered that the High 

Pressure (HP) air bleed valve operating mechanism could be a subject of 

excessive deterioration, influencing the aerodynamics and stability of the Low 

Pressure (LP) compressor (fan) rotor. 

This condition, if not corrected, could reduce fan flutter margin and, in some 

cases, could lead to multiple fan blade failures, possibly resulting in an 

uncontained release of high energy debris with consequent damage to, and/or 

reduced control of, the aeroplane. 

To address this potential unsafe condition, Rolls-Royce Deutschland Ltd & Co 

KG (RRD) issued Alert Non-Modification Service Bulletin (NMSB) 

TAY-75-A1784 to provide instructions for inspection of the HP air bleed valve 

operating mechanism. 

For the reasons described above, this AD requires a one-time inspection of the 

HP air bleed valve operating mechanism and, depending on findings, the 

accomplishment of applicable corrective action(s). 
EASA AD No.: 2013-0086

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 2/2 

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Effective Date: 23 April 2013 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Within 1 500 flight cycles after the effective date of this AD, inspect the HP 

air bleed valve operating mechanism in accordance with the instructions of 

RRD NMSB TAY-75-A1784. 

(2) If, during the inspection as required by paragraph (1) of this AD, the 

measured torque, necessary to open and close the HP air bleed valve, is 

higher than the applicable values referenced in RRD NMSB 

TAY-75-A1784, before next flight, accomplish all corrective actions in 

accordance with RRD NMSB TAY-75-A1784. 

Ref. Publications: Rolls-Royce Deutschland Alert NMSB TAY-75-A1784 Initial Issue dated 

14 February 2013. 

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 08 March 2013 as PAD 13-044 for consultation until 

05 April 2013. 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 

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 

Tel. + 49 3370861200 (direct 1016) Fax + 49 3370861212.