This document transmits Revision 1 of Non-Modification Service Bulletin TAY-72-A1821.

NOTE : If the Initial Issue of this Non-Modification Service Bulletin is already incorporated, no further Operator action is required with this Revision.

Document History

Non-Modification Service Bulletin Revision Status

Initial Issue Jan. 6/15

Non-Modification Service Bulletin Revision 1

Remove Incorporate Reason for change

All Pages of the Non-Modification Service Bulletin. Pages 1 to 16 of the Non-Modification Service Bulletin. To clarify the requirements for the re-calculation of the consumed cyclic life of the High Pressure (HP) turbine stage 1 disc with the P/N JR32013.**Printed in Great Britain** Mar.26/15

TAY SERIES PROPULSION SYSTEM SERVICE BULLETIN



# ALERT TAY−72−A1821
Transmittal - Page 1 of 1 

# ALERT1. Planning Information

A. Effectivity

(1) Fokker 100.

Tay 650-15 and Tay 650-15/10 Engines.

All engines which do not have the Service Bulletin TAY-72-1241 standard incorporated.

Modules M04300AA and M04301AA (Combustion and HP Turbine Module Modules).

(2) Boeing 727.

Tay 651-54 Engines.

All engines which do not have the Service Bulletin TAY-72-1241 standard incorporated.

Modules M04300AA and M04301AA (Combustion and HP Turbine Module Modules).

B. Concurrent Requirements

None.

C. Reason

The safe cyclic lives of critical parts of the High Pressure (HP) turbine stage 1 disc have been reviewed, which has resulted in the identification of a potentially reduced cyclic life limit for the HP turbine stage 1 discs with the P/N JR32013 (Vapour blasted HP turbine stage 1 disc of pre Service Bulletin TAY-72-1241 standard).

Operation of critical parts beyond these reduced cyclic life limits could lead to part failure and consequent release of high-energy debris, possibly resulting in damage to the airplane and/or injury to the occupants.

Review of operation and overhaul data indicates that it is unlikely that this standard of disc is still in service, since it has been superseded by a newer standard of disc in 1991. However, to finally ensure no parts are left in service and for the reasons described above, this Non-Modification Service Bulletin instructs replacement of those discs that have already exceeded the reduced cyclic life limit and replacement of all other affected discs before the reduced life limit is exceeded. ENGINE - HIGH PRESSURE (HP) TURBINE ROTOR - HP TURBINE STAGE 1 DISC - CHECK FOR AND REMOVAL OF VAPOUR BLASTED DISCS - NON-MODIFICATION SERVICE BULLETIN**Printed in Great Britain**



# TAY−72−A1821
Page 1 of 16 Jan. 6/15 Mar.26/15 Revision 1Revision 1 of this Non-Modification Service Bulletin has been issued to clarify the requirements for the re-calculation of the consumed cyclic life of the High Pressure (HP) turbine stage 1 disc with the P/N JR32013. R R R

D. Description R

SAFETY INTENT: R The safety intent of this Non-Modification Service Bulletin is to communicate the new cyclic life limit of the HP turbine stage 1 disc with the P/N JR32013 (Vapour HP turbine stage 1 disc of pre Service Bulletin TAY-72-1241 standard) given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. Depending on the service history of the HP turbine stage 1 disc with the P/N JR32013 a re-calculation of the consumed cyclic life is necessary. Where the new cyclic life limit is exceeded, replacement of the HP turbine stage 1 disc is required within 100 flight cycles after receipt of this Non-Modification Service Bulletin. R R R R R R R R R R R

This Non-Modification Service Bulletin is divided into two PARTs as follows:

PART A - Verification of the engine log book to determine if the High Pressure (HP) turbine stage 1 disc with the P/N JR32013 is installed.

NOTE : The Accomplishment Instruction for PART A of this Non-Modification Service Bulletin is divided into two INSTRUCTIONs as follows:

INSTRUCTION I - Applicable for engines "In Service".

INSTRUCTION II - Applicable for engines "At Overhaul/Shop Visit".

PART B - Instruction for the removal of the High Pressure (HP) turbine stage 1 discs with the P/N JR32013 from service.

NOTE : The Accomplishment Instruction of PART B of this Non-Modification Service Bulletin is applicable for engines "At Overhaul/Shop Visit" only.**Printed in Great Britain**



# TAY−72−A1821
Page 2 of 16 Jan. 6/15 Mar.26/15 Revision 1E. Compliance

PART A

ALERT

PART A of this Non-Modification Service Bulletin must be accomplished on all engines within 30 days after receipt of this Non-Modification Service Bulletin.

PART B

ALERT

If it is found in PART A of this Non-Modification Service Bulletin that a HP turbine stage 1 disc with the P/N JR32013 is installed, PART B of this Non-Modification Service Bulletin must be accomplished on all engines before the accumulated cyclic life exceeds the removal live given in the table below or within 100 flight cycles after receipt of this Non-Modification Service Bulletin, whichever comes later.

FLIGHT PLAN CYCLIC LIFE LIMIT

Tay 650-15 engine flight plan A 18900 flight cycles

Tay 650-15 engine flight plan B 15500 flight cycles

Tay 650-15 engine flight plan C 11500 flight cycles

Tay 650-15 engine flight plan D 9300 flight cycles

Tay 651-54 engine operation 10873 flight cycles

F. Approval

The technical content of this document is approved under the authority of EASA Design Organisation Approval No. EASA.21J.065.**Printed in Great Britain**



# TAY−72−A1821
Page 3 of 16 Jan. 6/15 Mar.26/15 Revision 1G. Manpower

Estimated Man-hours:

PART A

(1) In Service

30 minutes.

(2) At Overhaul/Shop Visit

Applicable (Hours not affected).

PART B

(1) In Service

Not applicable.

(2) At Overhaul/Shop Visit

Applicable (Hours not affected).

H. Material Price and Availability

Not applicable.

I. Tooling Price and Availability

New tools are not required.

J. Industry Support Information

None.

K. Weight and Balance

(1) Weight Change

None.

(2) Moment Arm

No effect.

(3) Datum

ES2540 (PPS100).**Printed in Great Britain**



# TAY−72−A1821
Page 4 of 16 Jan. 6/15 Mar.26/15 Revision 1L. Electrical Load Data

The aircraft electrical load is not affected by this Non-Modification Service Bulletin.

M. Software Accomplishment Summary

Not applicable.

N. References

For Tay 650-15 and Tay 650-15/10 Engines:

(1) Aircraft Maintenance Manual, Chapter 71-00-00.

(2) Engine Manual - E-TAY-3RR, Chapters 72-00-41 and 72-41-30.

(3) Power Plant Build-up Manual - R-R TAY 650-15 - TAY 650-15/10, Chapters 71-00-01, 71-00-02, 71-00-03 and 71-00-04.

(4) Service Bulletin TAY-72-1241

ENGINE - H.P. TURBINE ROTOR DISCS AND BLADES - H.P.1 and H.P.2 TURBINE DISCS WITH SHOT-PEENED SURFACES

(5) Time Limits Manual - T-TAY-3RR, Chapter 05-10-01. R

For Tay 651-54 Engines:

(1) Aircraft Maintenance Manual, Chapter 71-00-01.

(2) Engine Manual - E-TAY-5RR, Chapters 72-00-41 and 72-41-30.

(3) Service Bulletin TAY-72-1241

ENGINE - H.P. TURBINE ROTOR DISCS AND BLADES - H.P.1 and H.P.2 TURBINE DISCS WITH SHOT-PEENED SURFACES

(4) Time Limits Manual - T-TAY-5RR, Chapter 05-10-01. R

O. Other Publications Affected

None.

P. Interchangeability of Parts

Not affected.**Printed in Great Britain**



# TAY−72−A1821
Page 5 of 16 Jan. 6/15 Mar.26/15 Revision 12. Material Information

A. Parts to be Replaced

IPC Fig/Item No. New Part No. Unit Price (US Dollars) Qty Per Eng. Key Word Old Part No. Instructions/ Dispositions

PART B

72-41-32

02-010 JR33838 $ 123370.00 R 1 High Pressure (HP) turbine stage 1 disc JR32013 (1)(2)

B. Expendable Parts

Refer to the related Manual tasks given in the Accomplishment Instruction of this Non-Modification Service Bulletin.

C. Instruction/Disposition Codes

(1) It is necessary to replace the used part with a replacement part during the accomplishment of PART B of this Non-Modification Service Bulletin.

(2) The High Pressure (HP) turbine stage 1 disc, P/N JR32013 can be replaced by the High Pressure (HP) turbine stage 1 disc, P/N JR33838 by incorporation of PART 1 of Service Bulletin TAY-72-1241.**Printed in Great Britain**



# TAY−72−A1821
Page 6 of 16 Jan. 6/15 Mar.26/15 Revision 13. Accomplishment Instruction

INSTRUCTION I - APPLICABLE FOR ENGINES "IN SERVICE"

PART A - Verification of the engine log book to determine if the High Pressure (HP) turbine stage 1 disc with the P/N JR32013 is installed.

A. Verify the engine log book to determine if a High Pressure (HP) turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 (Vapour blasted HP turbine stage 1 disc of pre Service Bulletin TAY-72-1241 standard) is installed on the engine

(1) Tick the applicable box in the Accomplishment Form on page 16 to record that a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 is installed on the engine or not

(a) If no HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 is installed on the engine continue with step D.

CAUTION : SEVERAL OF THE GROUP A PARTS ARE COMMON TO DIFFERENT MARKS OF THE TAY ENGINE. THE CHANGE OF THE TURBINE STAGE 1 DISC (72-41-32, 02-010) BETWEEN THE 650-15 AND 651-54 MARKS OF THE TAY IS PERMISSIBLE. HOWEVER, THE REMAINING SERVICE LIFE OF THAT PART WILL BE THE LIFE RELATED WITH THE LOWEST DECLARED LIFE OF THAT PART ON EITHER ENGINE MARK. IT IS THE OPERATORS RESPONSIBILITY TO MAKE SURE THAT THE LIFE REMAINING, AS RECORDED IN THE ENGINE LOG BOOK, IS THAT RELATED WITH THE LOWEST LIFE DECLARED FOR EITHER ENGINE MARK. R R R R R R R R R

(b) If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 is installed on the engine, determine if the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been operated on a different engine mark (Tay 650-15 or Tay 651-54) and/or a different flight plan (Tay 650-15) R R R R R

[1] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has not previously been operated on a different engine mark (Tay 650-15 or Tay 651-54) and has not previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be tracked against the new cyclic life limit as given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R**Printed in Great Britain**



# TAY−72−A1821
Page 7 of 16 Jan. 6/15 Mar.26/15 Revision 1[2] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has not previously been operated on a different engine mark (Tay 650-15 or Tay 651-54) but has previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be re-calculated using the pro-rata calculation given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). Use the new cyclic life limit given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R R R R

[3] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has previously been operated on a different engine mark (Tay 650-15 or Tay 651-54) and has not previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be tracked against the new cyclic life limit as given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin using the consideration of the lowest declared cyclic life limit at engine mark changes given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R R R R R R R R

NOTE : Examples for the consideration of the lowest declared cyclic life limit at engine mark changes are given in the Tay 650-15 Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R**Printed in Great Britain**



# TAY−72−A1821
Page 8 of 16 Jan. 6/15 Mar.26/15 Revision 1[4] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has previously been operated on a different engine mark and has previously been operated to flight plans that are different to the currently operated flight plan it must be differentiated between the current engine applications: R R R R R

[a] The current application is a Tay 650-15 or Tay 650-15/10 Engine: R R

If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been operated on a different engine mark (Tay 651-54) and has previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be re-calculated using the combination of the consideration of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). Use the new cyclic life limit given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R R R R R R

NOTE : Examples for the combination of the consideration of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation are given in the Tay 650-15 Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R R R

NOTE : Depending on how often the flight plan of a HP turbine stage 1 disc has been changed, the achieved cyclic life may have to be calculated more than

once. R R R R**Printed in Great Britain**



# TAY−72−A1821
Page 9 of 16 Jan. 6/15 Mar.26/15 Revision 1[b] The current application is a Tay 651-54 Engine: R

If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been operated on a different engine mark (Tay 650-15) and has previously been operated to various flight plans of the different engine mark (Tay 650-15), the consumed cyclic life must be re-calculated using the combination of the consideration of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). Use the new cyclic life limit given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R R R R R R

NOTE : Examples for the combination of the consideration of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation are given in the Tay 650-15 Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R R R

NOTE : Depending on how often the flight plan of a HP turbine stage 1 disc has been changed, the achieved cyclic life may have to be calculated more than

once. R R R R

(c) If the new cyclic life limit of the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has not been exceeded, record the serial number, the hours and the new calculated cycles in the Accomplishment Form on page 16, continue with Step D. R R R R

(d) If the new cyclic life limit of the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been exceeded, record the serial number, the hours and the new calculated cycles in the Accomplishment Form on page 16, continue with step B. R R R R

B. Replace the engine within 100 flight cycles after receipt of this Non-Modification Service Bulletin R R

(1) For Tay 650-15 and Tay 650-15/10 Engines:

Refer to the Aircraft Maintenance Manual, Chapter 71-00-00 and to the Power Plant Build-up Manual, Chapters 71-00-01, 71-00-02, 71-00-03 and 71-00-04.

(2) For Tay 651-54 Engines:

Refer to the Aircraft Maintenance Manual, Chapter 71-00-01.**Printed in Great Britain**



# TAY−72−A1821
Page 10 of 16 Jan. 6/15 Mar.26/15 Revision 1(3) Send the removed engine to a Rolls-Royce approved overhaul facility for replacement of the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 in accordance with PART B of this Non-Modification Service Bulletin.

(4) Continue with step C.

C. Make sure that the work area is clean and clear of tools, equipment and other unwanted materials.

D. Complete the Accomplishment Form on page 16 and send it to Rolls-Royce Deutschland, Service Engineering. R

E. A record of accomplishment is required. Rolls-Royce Deutschland suggests to put an entry into the engine log book.**Printed in Great Britain**



# TAY−72−A1821
Page 11 of 16 Jan. 6/15 Mar.26/15 Revision 1INSTRUCTION II - APPLICABLE FOR ENGINES "AT OVERHAUL/SHOP VISIT"

PART A - Verification of the engine log book to determine if the High Pressure (HP) turbine stage 1 disc with the P/N JR32013 is installed.

F. Verify the engine log book to determine if a High Pressure (HP) turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 (Vapour blasted HP turbine stage 1 disc of pre Service Bulletin TAY-72-1241 standard) is installed on the engine

(1) Tick the applicable box in the Accomplishment Form on page 16 to record that a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 is installed on the engine or not

(a) If no HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 is installed on the engine continue with step H.

CAUTION : SEVERAL OF THE GROUP A PARTS ARE COMMON TO DIFFERENT MARKS OF THE TAY ENGINE. THE CHANGE OF THE HP TURBINE STAGE 1 DISC (72-41-32, 02-010) BETWEEN THE 650-15 AND 651-54 MARKS OF THE TAY IS PERMISSIBLE, HOWEVER, THE REMAINING SERVICE LIFE OF THAT PART WILL BE THE LIFE RELATED WITH THE LOWEST DECLARED LIFE OF THAT PART ON EITHER ENGINE MARK. IT IS THE REPAIR FACILITIES RESPONSIBILITY TO MAKE SURE THAT THE LIFE REMAINING, AS RECORDED IN THE ENGINE LOG BOOK, IS THAT RELATED WITH THE LOWEST LIFE DECLARED FOR EITHER ENGINE MARK. R R R R R R R R R

(b) If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 is installed on the engine, determine if the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been operated on a different engine mark (Tay 650-15 or Tay 651-54) and/or a different flight plan (Tay 650-15) R R R R R

[1] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has not previously been operated on a different engine mark (Tay 650-15 or Tay 651-54) and has not previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be tracked against the new cyclic life limit as given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R

[2] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has not previously been operated on a different engine mark (Tay 650-15 or Tay 651-54) but has previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be re-calculated using the pro-rata calculation given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). Use the new cyclic life limit given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R R R R**Printed in Great Britain**



# TAY−72−A1821
Page 12 of 16 Jan. 6/15 Mar.26/15 Revision 1[3] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has previously been operated on a different engine mark (Tay 650-15 or Tay 651-54) and has not previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be tracked against the new cyclic life limit as given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin using the consideration of the lowest declared cyclic life limit at engine mark changes given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R R R R R R R R

NOTE : Examples for the consideration of the lowest declared cyclic life limit at engine mark changes are given in the Tay 650-15 Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R

[4] If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has previously been operated on a different engine mark and has previously been operated to flight plans that are different to the currently operated flight plan it must be differentiated between the current engine applications: R R R R R

[a] The current application is a Tay 650-15 or Tay 650-15/10 Engine: R R

If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been operated on a different engine mark (Tay 651-54) and has previously been operated to flight plans that are different to the currently operated flight plan (Tay 650-15), the consumed cyclic life must be re-calculated using the combination of the consideration of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). Use the new cyclic life limit given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R R R R R R

NOTE : Examples for the combination of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation are given in the Tay 650-15 Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R R

NOTE : Depending on how often the flight plan of a HP turbine stage 1 disc has been changed, the achieved cyclic life may have to be calculated more than

once. R R R R**Printed in Great Britain**



# TAY−72−A1821
Page 13 of 16 Jan. 6/15 Mar.26/15 Revision 1[b] If the current application is a Tay 651-54 Engine: R

If a HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been operated on a different engine mark (Tay 650-15) and has previously been operated to various flight plans of the different engine mark (Tay 650-15), the consumed cyclic life must be re-calculated using the combination of the consideration of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation given in the Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). Use the new cyclic life limit given in paragraph 1.E.Compliance of this Non-Modification Service Bulletin. R R R R R R R R R R R R

NOTE : Examples for the combination of the lowest declared cyclic life limit at engine mark changes and the pro-rata calculation are given in the Tay 650-15 Time Limits Manual (Refer to the Time Limits Manual, Chapter 05-10-01, Task 05-10-01-800-000). R R R R R

NOTE : Depending on how often the flight plan of a HP turbine stage 1 disc has been changed, the achieved cyclic life may have to be calculated more than

once. R R R R

(c) If the new cyclic life limit of the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has not been exceeded, record the serial number, the hours and the new calculated cycles in the Accomplishment Form on page 16, continue with Step H. R R R R

(d) If the re-calculated cyclic life of the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 does not meet the target built life, record the serial number, the hours and the new calculated cycles in the Accomplishment Form on page 16, continue with step G. R R R R

(e) If the new cyclic life limit of the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 has been exceeded, record the serial number, the hours and the new calculated cycles in the Accomplishment Form on page 16, continue with step G. R R R R

G. Replace the HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 in accordance with PART B of this Non-Modification Service Bulletin.

H. Complete the Accomplishment Form on page 16 and send it to Rolls-Royce Deutschland, Service Engineering. R

I. A record of accomplishment is required. Rolls-Royce Deutschland suggests to put an entry into the engine log book.**Printed in Great Britain**



# TAY−72−A1821
Page 14 of 16 Jan. 6/15 Mar.26/15 Revision 1APPLICABLE FOR ENGINES "AT OVERHAUL/SHOP VISIT"

PART B - Instruction for removal of the High Pressure (HP) turbine stage 1 discs with the P/N JR32013 from service.

J. General

(1) Obey all the WARNINGS and CAUTIONS in the procedures that are referred to.

(2) Consumable Materials

(a) Refer to the related Manual tasks given in this instruction.

(3) Tools and Equipment

(a) Refer to the related Manual tasks given in this instruction.

K. Remove the combustion and High Pressure (HP) turbine module from the engine and disassemble (Refer to the Engine Manual, Chapter 72-00-41, TASK 72-00-41-000-000).

L. Disassemble the HP turbine rotor discs and shaft (Refer to the Engine Manual, Chapter 72-41-30, TASK 72-41-30-000-000)

(1) Remove the used HP turbine stage 1 disc (72-41-32, 02-010), P/N JR32013 in accordance with PART 1 of Service Bulletin TAY-72-1241.

M. Assemble the HP turbine rotor discs and shaft (Refer to the Engine Manual, Chapter 72-41-30, TASK 72-41-30-400-000)

(1) Install a replacement HP turbine stage 1 disc (72-41-32, 02-010), P/N JR33838 in accordance with PART 1 of Service Bulletin TAY-72-1241.

N. Assemble the combustion and HP turbine module and install on the engine (Refer to the Engine Manual, Chapter 72-00-41, TASK 72-00-41-400-000).

O. Make sure that the work area is clean and clear of tools, equipment and other unwanted materials.

P. A record of accomplishment is required. Rolls-Royce Deutschland suggests to put an entry into the engine log book.**Printed in Great Britain**



# TAY−72−A1821
Page 15 of 16 Jan. 6/15 Mar.26/15 Revision 1R

Accomplishment Form R**Printed in Great Britain**



# TAY−72−A1821
Page 16 of 16 Jan. 6/15 Mar.26/15 Revision 1

# S ERVICE BULLETIN FEEDBACK FORM

M ar

. 26 / 15 Revision 1 © Rolls

- Royce Deutschland Ltd & Co KG TAY

- 72

- A 1821 Page 1 of 1 Printed in Great Britain 

### Please use this form to give feedback on the quality of this Service Bulletin. The input you provide will be used to analyse areas of improvement and to take action to further improve the quality of our Service Bulletins.

We thank you for the time you sp ent in completing this form.

Please rate on a scale of 1 to 5, with 5 being the highest score:

- General quality rating of this Service Bulletin  1  2  3  4  5

- Quality rating of the Accomplishment Instructions  1  2  3  4  5

- Quality rating of the Illustration  1  2  3  4  5

- Is this Service Bulletin easy to understand ?  Yes  No

If you have had difficulties to perform thi s Service Bulletin please quote below the area(s) and give a short description of the issue:

Operator: Overhaul Site:
Name/Title: Date:

Please send the completed Service Bulletin Feedback Form to Rolls

- Royce Deutschland, Service Bulletin Group. Email: mailto:RRD.SERVICE.BULLETINS@ROLLS

- ROYCE .COM



### Planning Information Section: Material Information Section: Accomplishment Instruction Section:

 1.A.  1.I.  2.A.  General  1.B.  1.J.  2.B.  Get Access  1.C.  1.K.  2.C.  Removal/Installation  1.D.  1.L.  2.D.  In spection  1.E.  1.M.  2.E.  Test  1.F.  1.N.  2.F.  Close the Access  1.G.  1.O.  Log Book Entry  1.H  1.P.

Explanatory notes: