EASA AD No : 2009-0092 

EASA Form 110 Page 1/2 

EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2009-0092 

Date: 17 April 2009 

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 Airworthiness Directive applies, except in accordance with the requirements of that Airworthiness 

Directive 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 620-15, Tay 650-15 & Tay 651-54 

series engines 

TCDS Number : EASA.E.063 

Foreign AD : Not applicable 

Supersedure : None 

ATA 72 Engine – High Pressure Compressor Discs Stages 1, 3, 6, 7 and 12 

– Decrease of approved lives 

Manufacturer(s): Rolls-Royce plc. 

Applicability: Tay 620-15, Tay 650-15 and Tay 651-54 series engines, all engine serial 

numbers. 

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

Mark 0070 and Mark 0100, and Boeing 727 series aeroplanes. 

Reason: Following a review of operational data of the Tay 651-54 engine, it has been 

found that the actual stress levels in the Tay 651-54 engine High Pressure 

Compressor (HPC) stages 1, 3, 6, 7 and 12 discs were higher than those 

originally assumed and therefore the approved lives needed to be reduced. 

As Tay 651-54 service run HPC discs may be installed on Tay 620-15 and 

Tay 650-15 engine models, it is necessary to reduce the maximum approved 

lives of the affected HPC disc serial numbers installed on Tay 620-15 and 

Tay 650-15 engines as well. 

The approved lives of the affected HPC stages 1, 3, 6, 7 and 12 discs 

specified in this Airworthiness Directive supersede the approved lives given 

in the Time Limits Manuals, Chapter 05-10-01. 

Exceeding of the approved life limits could potentially result in non-contained 

disc failure. 
EASA AD No : 2009-0092 

EASA Form 110 Page 2/2 

Effective Date: 04 May 2009 

Required Action(s) 

and Compliance 

Time(s): 

Within 30 days after the effective date of this AD, amend the approved 

Operator’s maintenance programme to incorporate the new life as follows: 

For Tay 651-54 Engines:

The maximum approved lives (MAL) of the High Pressure Compressor (HPC) 

rotor discs are reduced to : 

For Part Number the MAL is 

HPC Stage 1 Disc JR18049 18,800 cycles 

HPC Stage 3 Disc JR18743 18,100 cycles 

HPC Stage 6 Disc JR18748 19,300 cycles 

HPC Stage 7 Disc JR17365 17,300 cycles 

HPC Stage 12 Disc JR31928 18,900 cycles 

For Tay 620-15 and Tay 650-15 Engines:

The maximum approved lives (MAL) of certain High Pressure Compressor 

(HPC) rotor discs are reduced. 

The disc serial numbers and the maximum approved lives are defined in 

Rolls-Royce Deutschland Non-Modification Service Bulletin TAY-72-A1740 

Initial Issue. 

Ref. Publications: 

Rolls-Royce Deutschland Alert NMSB TAY-72-A1740 Initial Issue 

Rolls-Royce Deutschland Time Limits Manuals T-TAY-2RR (Tay 620-15) 

Rolls-Royce Deutschland Time Limits Manuals T-TAY-3RR (Tay 650-15) 

Rolls-Royce Deutschland Time Limits Manuals T-TAY-5RR (Tay 651-54) 

The use of later approved revisions of these documents 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 25 February 2009 as PAD 09-046 for 

consultation until 25 March 2009. The Comment Response Document 

can be found at: http://ad.easa.europa.eu/ 

3. Enquiries regarding this AD should be referred to the Airworthiness 

Directives, Safety Management & Research Section, Certification 

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,D-15827 Blankenfelde-Mahlow, Germany 

Telephone: +49 (0) 33 7086 1768, Fax +49 (0) 33 7086 3356