This document transmits Revision 3 of Service Bulletin SB-BR700-72-A101523.
NOTE : If any of the previous issues of this Service Bulletin is already incorporated, no further Operator action is required with this Revision. This Service Bulletin can be embodied "In Service" or "At Overhaul/Shop Visit". Document History Service Bulletin Revision Status Initial Issue Sep. 5/05 Revision 1 Dec.14/05 Revision 2 Dec.19/13 Service Bulletin Revision 3
Remove Incorporate Reason for change All pages of the Service Bulletin. Pages 1 to 18 of the Service Bulletin. To change the Compliance category to ALERT, to extend the accomplishment date for the Service Bulletin until 31st January 2016 and to include some minor editorial changes.**Printed in Great Britain** Dec.10/15

BR700 SERIES PROPULSION SYSTEM SERVICE BULLETIN



# ALERT SB−BR700−72−A101523 Transmittal - Page 1 of 1 

# ALERT1. Planning Information A. Effectivity (1) BR700-710A1-10 Engines. Prior to Engine Serial Number 11506. Modules M51-104 and M51-111 (LP Turbine Module). (2) BR700-710A2-20 Engines. Prior to Engine Serial Number 12493. Modules M51-108 and M51-111 (LP Turbine Module). (3) BR700-710C4-11 Engines. (a) For engines which have hardware configuration standard 710C4-11 engraved on the engine data plate (Service Bulletin SB-BR700-72-101466 standard not incorporated). Prior to Engine Serial Number 15278. Module M51-112 (LP Turbine Module). (b) For engines which have hardware configuration standard 710C4-11/10 engraved on the engine data plate (Service Bulletin SB-BR700-72-101466 standard incorporated). Prior to Engine Serial Number 15330. Module M51-112 (LP Turbine Module). B. Concurrent Requirements
None. C. Reason (1) Problem It is possible for the pawl carrier of the fuel shut-off mechanism to seize. This is caused by corrosion of the pawl carrier pivot pins. ENGINE - LOW PRESSURE (LP) TURBINE SHUT-OFF PAWL CARRIER - INTRODUCTION OF FUEL

SHUT-OFF PAWL CARRIER PIVOT PINS MADE FROM A DIFFERENT MATERIAL WITH IMPROVED CORROSION PROTECTION PROPERTIES**Printed in Great Britain**



# SB−BR700−72−A101523 Page 1 of 18 Sep. 5/05 Dec.10/15 Revision 3(2) Evidence This was identified during engine overhaul. (3) Substantiation The changes introduced by this Service Bulletin were the subject of satisfactory engineering analysis. This Service Bulletin complies with the applicable engine certification basis. (4) Objective Introduction of this Service Bulletin is designed to maintain reliability. (5) Effect of Bulletin on: (a) Operation Not affected. (b) Maintenance Not affected. (c) Overhaul Not affected. (d) Repair Schemes Not affected. (e) Interchangeability Not affected. (f) Fits and Clearances Not affected. Revision 2 of this Service Bulletin had R been issued to extend the date in the Note of the Compliance, to update the Effectivity and the Accomplishment Form and to include some minor editorial changes. Revision 3 of this Service Bulletin has been issued to change the Compliance category to ALERT, to extend the accomplishment date for the Service Bulletin until 31st January 2016 and to include some minor editorial changes. R R R**Printed in Great Britain**



# SB−BR700−72−A101523 Page 2 of 18 Sep. 5/05 Dec.10/15 Revision 3D. Description This Service Bulletin introduces fuel shut-off pawl carrier pivot pins made from a different material, which have improved corrosion protection properties.
NOTE : The Accomplishment Instruction of this 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". E. Compliance
ALERT R This R Service Bulletin must be accomplished on all engines by 31st January 2016. R R F. Approval The technical content of this document is approved under the authority of EASA Design Organisation Approval No. EASA.21J.065. G. Manpower Estimated Man-hours: (1) In Service 3 hours. (2) At Overhaul/Shop Visit Applicable (Hours not affected).**Printed in Great Britain**



# SB−BR700−72−A101523 Page 3 of 18 Sep. 5/05 Dec.10/15 Revision 3H. Material Price and Availability A modification kit is not required; parts are supplied as single line items. This is a technical document not a quotation; any prices in this Service Bulletin are given in good faith without engagement. The prices listed within the Material Information are at the year of Service Bulletin issue. For availability of spares, contact: Rolls-Royce Deutschland Ltd & Co KG Spares Business Eschenweg 11 15827 Blankenfelde-Mahlow Germany Tel: R +49 33-7086-3535 E-mail: rrd-spares@rolls-royce.com R I. Tooling Price and Availability New tools are not required. J. Industry Support Information The incorporation of this Service Bulletin is not free of charge.
NOTE : For further information contact your Rolls-Royce Regional Customer Manager (RCM). K. Weight and Balance (1) Weight Change
None. (2) Moment Arm No effect. (3) Datum ES2540 (PPS100). L. Electrical Load Data The aircraft electrical load is not affected by this Service Bulletin.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 4 of 18 Sep. 5/05 Dec.10/15 Revision 3M. Software Accomplishment Summary Not applicable. N. References For BR700-710A1-10 Engines: (1) Modification Bulletin 72-101523 Issue 04 R dated Dec. 9/15. (2) Engine Maintenance Manual - M-710-1BR, Chapters 70-50-02, 72-00-31, 72-56-15 and 78-10-02. (3) Engine Manual - E-710-1BR, Chapters 72-38-02, 72-51-00, 72-56-15 and 78-10-02. For BR700-710A2-20 Engines: (1) Modification Bulletin 72-101523 Issue 04 R dated Dec. 9/15. (2) Engine Maintenance Manual - M-710-2BR, Chapters 70-50-02, 72-31-01, 72-56-15 and 78-10-02. (3) Engine Manual - E-710-2BR, Chapters 72-38-02, 72-51-00, 72-56-15 and 78-10-02. For BR700-710C4-11 Engines: (1) Modification Bulletin 72-101523 Issue 04 R dated Dec. 9/15. (2) Engine Maintenance Manual - M-710-4BR, Chapters 70-50-02, 72-00-31, 72-56-15 and 78-10-02. (3) Engine Manual - E-710-4BR, Chapters 72-38-02, 72-51-00, 72-56-15 and 78-10-02. O. Other Publications Affected For BR700-710A1-10 Engines: (1) Illustrated Parts Catalog - S-710-1BR, Chapter 72-51-26. For BR700-710A2-20 Engines: (1) Illustrated Parts Catalog - S-710-2BR, Chapter 72-51-26. For BR700-710C4-11 Engines: (1) Illustrated Parts Catalog - S-710-4BR, Chapter 72-51-26.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 5 of 18 Sep. 5/05 Dec.10/15 Revision 3P. Interchangeability of Parts Affected (Refer to paragraph 2.F. Instruction/Disposition Codes).**Printed in Great Britain**



# SB−BR700−72−A101523 Page 6 of 18 Sep. 5/05 Dec.10/15 Revision 32. Material Information A. Parts required to accomplish this Service Bulletin (In addition to Parts in 2.B., 2.C. and 2.E.)
IPC Fig/Item No. New Part No. Unit Price (US Dollars) Qty Per Eng. Key Word Old Part No. Instructions/ Dispositions

72-51-26 01-300 BRR24416 $ 430.00 R 2 Pawl carrier pivot pin BRR17117 (1)

B. Parts to be Reworked
None. C. New Production Parts
None. D. Redundant Parts
None. E. Expendable Parts Refer to the related Manual tasks given in the Accomplishment Instruction of this Service Bulletin. F. Instruction/Disposition Codes (1) The old and new parts are fully interchangeable as a set only.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 7 of 18 Sep. 5/05 Dec.10/15 Revision 33. Accomplishment Instruction
INSTRUCTION I - APPLICABLE FOR ENGINES "IN SERVICE" A. General
NOTE : In order to reduce the potential for multiple-engine in-flight shutdown, power loss, or other anomaly due to maintenance error, Rolls-Royce Deutschland recommends that Operators avoid performing maintenance on multiple engines installed on the same aircraft at the same time. If it is not possible to avoid maintenance on more than one engine of an aircraft at the same time, Rolls-Royce Deutschland recommends that additional controls are applied in order to ensure that maintenance tasks have been completed as defined.
WARNING : YOU MUST BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE IS STOPPED. THE ENGINE PARTS CAN STAY HOT FOR ALMOST ONE HOUR.
WARNING : DO NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY. IF YOU GET AN INJURY PUT IT IN COLD WATER FOR TEN MINUTES AND GET MEDICAL AID. (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. (4) Refer to the Engine Maintenance Manual, Chapter 70-50-02, PB201/TASK 70-50-02-910-801 for all torque procedures. B. Get access to the Low Pressure (LP) turbine fuel shut-off pawl carrier that is installed on the rear face of the LP turbine stage 2 disc (1) Remove the exhaust cone from the engine (Refer to the Engine Maintenance Manual, Chapter 78-10-02, PB401/TASK 78-10-02-000-801). (2) Remove the outer exhaust air baffle from the engine (Refer to the Engine Maintenance Manual, Chapter 72-56-15, PB401/TASK 72-56-15-000-801). C. Put a protective cover below the pawl carrier to make sure that no parts or tools can fall into the engine.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 8 of 18 Sep. 5/05 Dec.10/15 Revision 3D. Replace the two pawl carrier pivot pins (72-51-26, 01-300) that are installed on the pawl carrier (72-51-26, 01-100) (Refer to Figure 1) (1) Replace one pawl carrier pivot pin (72-51-26, 01-300) (a) Hold the Dee head bolt (72-51-26, 01-290) in the fully rearward position. At the same time remove the nut (72-51-26, 01-275) from the thread of the Dee head bolt (72-51-26, 01-290). (b) Hold the pawl (72-51-26, 01-310) and the spring (72-51-26, 01-320) in position on the pawl carrier (72-51-26, 01-100). At the same time remove the old pawl carrier pivot pin (72-51-26, 01-300), P/N BRR17117 together with the retaining plate (72-51-26, 01-250) from the pawl carrier (72-51-26, 01-100). (c) Remove the pawl (72-51-26, 01-310) together with the spring (72-51-26, 01-320) from the pawl carrier (72-51-26, 01-100). (d) Push the Dee head bolt (72-51-26, 01-290) through the hole of the pawl carrier (72-51-26, 01-100) fully rearward. (e) Put and hold the pawl (72-51-26, 01-310) together with the spring (72-51-26, 01-320) in position on the pawl carrier (72-51-26, 01-100). (f) Install the new pawl carrier pivot pin (72-51-26, 01-300), P/N BRR24416 together with the retaining plate (72-51-26, 01-250) on the pawl carrier (72-51-26, 01-100) [1] Make sure that the pawl carrier pivot pin (72-51-26, 01-300) is correctly installed through the holes of the pawl carrier (72-51-26, 01-100), the pawl (72-51-26, 01-310) and the spring (72-51-26, 01-320). [2] Make sure that the retaining plate (72-51-26, 01-250) is correctly engaged in the groove of the pawl carrier pivot pin (72-51-26, 01-300). [3] Make sure that the thread of the Dee head bolt (72-51-26, 01-290) is correctly engaged in the hole of the retaining plate (72-51-26, 01-250). (g) Hold the Dee head bolt (72-51-26, 01-290) in the fully rearward position. At the same time install the nut (72-51-26, 01-275) on the thread of the Dee head bolt (72-51-26, 01-290). (h) Torque the nut (72-51-26, 01-275) to 11,5 Nm (100 lbf in.).**Printed in Great Britain**



# SB−BR700−72−A101523 Page 9 of 18 Sep. 5/05 Dec.10/15 Revision 3(i) Make sure that the pawl (72-51-26, 01-310) and the spring (72-51-26, 01-320) are free to move around the pawl carrier pivot pin (72-51-26, 01-300) [1] If the pawl (72-51-26, 01-310) and the spring (72-51-26, 01-320) do not move easily do the steps D.(1)(a) to D.(1)(i) again to replace the pawl carrier pivot pin (72-51-26, 01-300). (2) Do the steps D.(1)(a) to D.(1)(i) again to replace the other pawl carrier pivot pin (72-51-26, 01-300). E. Remove the protective cover from the engine. F. Do an inspection of the pawl carrier adjustment to make sure that the two pawls (72-51-26, 01-310) are installed in their correct positions (Refer to Figure 2)
CAUTION : THE DIMENSION D MUST BE BETWEEN 1,4 AND 2,6 MM (0.055 AND 0.102 IN.). IF THE DIMENSION D IS NOT IN THIS TOLERANCE, THE LP TURBINE OVERSPEED SPLITTER UNIT CAN OPERATE AND CAUSE AN IN-FLIGHT SHUTDOWN. (1) Make sure that the pawl arms (1) of the two pawls (72-51-26, 01-310) are fully engaged in the middle of the 8 mm (0.315 in.) slots (2) of the LP reference tube. The two dimensions D at each 8 mm (0.315 in.) slot (2) of the LP reference tube must be between 1,4 and 2,6 mm (0.055 and 0.102 in.)
NOTE : There are four slots in the LP reference tube. The 8 mm (0.315 in.) slots (2) are the two smaller and closed slots in the LP reference tube. (a) If any pawl arm (1) of the two pawls (72-51-26, 01-310) is not correctly engaged in the 8 mm (0.315 in.) slot (2) of the LP reference tube, adjust the pawl carrier (72-51-26, 01-100) in relation to the LP reference tube in accordance with the Engine Maintenance Manual task that follows: [1] For BR700-710A1-10 and BR700-710C4-11 Engines: Refer to the Engine Maintenance Manual, Chapter 72-00-31, PB401/TASK 72-00-31-400-801. [2] For BR700-710A2-20 Engines: Refer to the Engine Maintenance Manual, TASK 72-31-01-400-801. G. Make sure that the work area is clean and clear of tools, equipment and other unwanted materials.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 10 of 18 Sep. 5/05 Dec.10/15 Revision 3H. Close the access to the LP turbine fuel shut-off pawl carrier (1) Install the outer exhaust air baffle on the engine (Refer to the Engine Maintenance Manual, Chapter 72-56-15, PB401/TASK 72-56-15-400-801). (2) Install the exhaust cone on the engine (Refer to the Engine Maintenance Manual, Chapter 78-10-02, PB401/TASK 78-10-02-400-801). I. Complete the Accomplishment Form on page 18 and send it to Rolls-Royce Deutschland, Service Engineering. R J. A record of accomplishment is required. Rolls-Royce Deutschland suggests to put an entry into the engine log book (1) Record the incorporation of Service Bulletin SB-BR700-72-A101523 R in the Engine Service Record. (2) Record the incorporation of Service Bulletin SB-BR700-72-A101523 R in the Service Record of the Module 51 Log Card. (3) Record the incorporation of Service Bulletin SB-BR700-72-A101523 R in the Service Bulletins list of the Module 51 Log Card.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 11 of 18 Sep. 5/05 Dec.10/15 Revision 3INSTRUCTION II - APPLICABLE FOR ENGINES "AT OVERHAUL/SHOP VISIT" K. 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. L. Get access to the Low Pressure (LP) turbine fuel shut-off pawl carrier that is installed on the rear face of the LP turbine stage 2 disc (1) Remove the exhaust cone from the engine (a) For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 78-10-02, PB301/TASK 78-10-02-000-001. (b) For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 78-10-02, PB301/TASK 78-10-02-000-801. (2) Remove the outer exhaust air baffle from the engine (a) For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 72-56-15, PB301/TASK 72-56-15-000-001. (b) For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 72-56-15, PB301/TASK 72-56-15-000-801. M. Put a protective cover below the pawl carrier to make sure that no parts or tools can fall into the engine.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 12 of 18 Sep. 5/05 Dec.10/15 Revision 3N. Remove the two old pawl carrier pivot pins (72-51-26, 01-300), P/N BRR17117 from the pawl carrier (1) For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 72-51-00, PB501/TASK 72-51-00-000-001. (2) For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 72-51-00, PB501/TASK 72-51-00-000-801. O. Install the two new pawl carrier pivot pins (72-51-26, 01-300), P/N BRR24416 on the pawl carrier (1) For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 72-51-00, PB1001/TASK 72-51-00-400-001. (2) For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 72-51-00, PB1001/TASK 72-51-00-400-801. P. Make sure that the pawls on the pawl carrier are free to move around the pawl carrier pivot pins (72-51-26, 01-300) (1) If any pawl do not move easily do the steps N. and O. again to replace the pawl carrier pivot pin (72-51-26, 01-300) at the affected pawl. Q. Remove the protective cover from the engine.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 13 of 18 Sep. 5/05 Dec.10/15 Revision 3R. Do an inspection of the pawl carrier adjustment to make sure that the two pawls (72-51-26, 01-310) are installed in their correct positions (Refer to Figure 2)
CAUTION : THE DIMENSION D MUST BE BETWEEN 1,4 AND 2,6 MM (0.055 AND 0.102 IN.). IF THE DIMENSION D IS NOT IN THIS TOLERANCE, THE LP TURBINE OVERSPEED SPLITTER UNIT CAN OPERATE AND CAUSE AN IN-FLIGHT SHUTDOWN. (1) Make sure that the pawl arms (1) of the two pawls (72-51-26, 01-310) are fully engaged in the middle of the 8 mm (0.315 in.) slots (2) of the LP reference tube. The two dimensions D at each 8 mm (0.315 in.) slot (2) of the LP reference tube must be between 1,4 and 2,6 mm (0.055 and 0.102 in.)
NOTE : There are four slots in the LP reference tube. The 8 mm (0.315 in.) slots (2) are the two smaller and closed slots in the LP reference tube. (a) If any pawl arm (1) of the two pawls (72-51-26, 01-310) is not correctly engaged in the 8 mm (0.315 in.) slot (2) of the LP reference tube, adjust the pawl carrier (72-51-26, 01-100) in relation to the LP reference tube in accordance with the Engine Manual task that follows: [1] For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 72-38-02, PB401/TASK 72-38-02-400-001. [2] For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 72-38-02, PB401/TASK 72-38-02-400-801. S. Make sure that the work area is clean and clear of tools, equipment and other unwanted materials.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 14 of 18 Sep. 5/05 Dec.10/15 Revision 3T. Close the access to the LP turbine fuel shut-off pawl carrier (1) Install the outer exhaust air baffle on the engine (a) For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 72-56-15, PB401/TASK 72-56-15-400-001. (b) For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 72-56-15, PB401/TASK 72-56-15-400-801. (2) Install the exhaust cone on the engine (a) For BR700-710A1-10 and BR700-710A2-20 Engines: Refer to the Engine Manual, Chapter 78-10-02, PB401/TASK 78-10-02-400-001. (b) For BR700-710C4-11 Engines: Refer to the Engine Manual, Chapter 78-10-02, PB401/TASK 78-10-02-400-801. U. Complete the Accomplishment Form on page 18 and send it to Rolls-Royce Deutschland, Service Engineering. R V. A record of accomplishment is required. Rolls-Royce Deutschland suggests to put an entry into the engine log book (1) Record the incorporation of Service Bulletin SB-BR700-72-A101523 R in the Engine Service Record. (2) Record the incorporation of Service Bulletin SB-BR700-72-A101523 R in the Service Record of the Module 51 Log Card. (3) Record the incorporation of Service Bulletin SB-BR700-72-A101523 R in the Service Bulletins list of the Module 51 Log Card.**Printed in Great Britain**



# SB−BR700−72−A101523 Page 15 of 18 Sep. 5/05 Dec.10/15 Revision 3Removal and Installation of the Pawl Carrier Pivot Pins (72-51-26, 01-300) Figure 1**Printed in Great Britain**



# SB−BR700−72−A101523 Page 16 of 18 Sep. 5/05 Dec.10/15 Revision 3Inspection of the Pawl Carrier Adjustment Figure 2**Printed in Great Britain**



# SB−BR700−72−A101523 Page 17 of 18 Sep. 5/05 Dec.10/15 Revision 3R

Accomplishment Form R**Printed in Great Britain**



# SB−BR700−72−A101523 Page 18 of 18 Sep. 5/05 Dec.10/15 Revision 3

# S ERVICE BULLETIN FEEDBACK FORM

Dec

. 10 / 15 Revision 3 © Rolls

- Royce Deutschland Ltd & Co KG SB

- BR700

- 72

- A101523 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 ta ke 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:

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- 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: