EASA AD No.: 2012-0185-E 

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EASA EMERGENCY AIRWORTHINESS DIRECTIVE 

AD No.: 2012-0185-E 

Date: 12 September 2012 

Note: This Emergency 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): 

Tay 620-15 series engines

TCDS Number: EASA.E.063 

Foreign AD: Not applicable 

Supersedure: None 

ATA 72 Engine – Low Pressure Compressor Rotor Blades – Inspection / 

Replacement 

Manufacturer(s): Rolls-Royce plc 

Applicability: Tay 620-15 engines, serial numbers 17054, 17085, 17088, 17107 and 17166. 

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

Mk.0070 and Fokker F28 Mk.0100 aeroplanes. 

Reason: Fan blade off on a Tay 620-15 engine has recently been reported. Subsequent 

investigation results identified vibration induced by a fan blade flutter as a 

possible cause of fan blade root failure leading to the blade off. 

This condition, if not detected and corrected, could lead to the blade failure 

potentially causing release of high-energy debris, possibly resulting in damage 

to the aeroplane and/or injury to the occupants. 

To minimise the potential for further fan blade failure occurrences Rolls Royce 

Deutschland (RRD) issued a Non-Modification Service Bulletin (NMSB) Alert 

Tay-72-A1775 providing instruction for Low Pressure Compressor (LPC) fan 

blades inspection. The NMSB Alert Tay-72-A1775 was updated to Revision 1 

shortly after Initial issue was released due to minor wording correction. 

For the reasons described above, this AD requires accomplishment of two 

ultrasonic inspections of the LPC fan blades and, depending of finding, 

accomplishment of a corrective action. 

Effective Date: 12 September 2012 
EASA AD No.: 2012-0185-E 

CAP.00111-001 © European Aviation Safety Agency. All rights reserved. 2/2 

Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet.

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Before next flight, after the effective date of this AD, and thereafter before 

1 500 engine flight hours (EFH) but not before 1 000 EFH after initial 

inspection, accomplish an ultrasonic inspection of the LPC fan blades in 

accordance with RRD NMSB 72-A1775 Revision 1. 

(2) If during any of the two inspections as required by paragraph (1) of this AD, 

any indication of a fan blade crack is detected, before next flight, replace 

the complete set of LPC fan blades and the LPC fan disc with a 

serviceable LPC fan blade set and LPC fan disc. After replacement return 

the removed parts to RRD for further investigation.

(3) Replacement of the set of LPC fan blades and LPC fan disc, as required 

by paragraph (2) of this AD constitutes terminating action for inspections 

required by paragraph (1) of this AD. 

Ref. Publications: RRD NMSB Alert Tay-72-A1775 Revision 1, dated 12 September 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 results of the safety assessment have indicated the need for 

immediate publication and notification, without the full public consultation 

process. 

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.