EASA AD No.: 2013-0086

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 1/2 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2013-0086

Date: 09 April 2013

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

This AD is issued in accordance with EU 748/2012, P art 21.A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be en sured by accomplishing any applicable ADs. Conseque ntly, no person may operate an aircraft to which an AD applies, except in accor dance with the requirements of that AD, unless othe rwise specified by the Agency [EC 2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/200 8, 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 Pre ssure 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 engi nes discovered that the High Pressure (HP) air bleed valve operating mechanism c ould be a subject of excessive deterioration, influencing the aerodynami cs 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, p ossibly resulting in an uncontained release of high energy debris with cons equent damage to, and/or reduced control of, the aeroplane.
To address this potential unsafe condition, Rolls-R oyce Deutschland Ltd & Co KG (RRD) issued Alert Non-Modification Service Bull etin (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, dependi ng 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 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. Effective Date: 23 April 2013

Required Action(s) and Compliance Time(s): Required as indicated, unless accomplished previous ly:
(1) Within 1 500 flight cycles after the effective date of this AD, inspect the HP air bleed valve operating mechanism in accordance w ith the instructions of RRD NMSB TAY-75-A1784.
(2) If, during the inspection as required by paragr aph (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 co rrective actions in accordance with RRD NMSB TAY-75-A1784.

Ref. Publications: Rolls-Royce Deutschland Alert NM SB TAY-75-A1784 Initial Issue dated 14 February 2013.
The use of later approved revisions of this documen t 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. This AD was posted on 08 March 2013 as PAD 13-04 4 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 conten t 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 3370861 212.