This document transmits Revision 1 to Service Bulletin RB211-73-G723 Document History Service Bulletin Revision Status Supplement Revision Status Initial Issue Sep.26/11 Bulletin Revision 1 Remove Incorporate Reason for change All pages of the Service Bulletin Pages 1 to 15 of the Service Bulletin To amend Fig/Item number in Accomplishment Instructions (3.A.(1)(a)), to add reference to SB 73-G738 in Accomplishment Instructions (3.A.(2)(a) and 3.A.(4)) and to correct frettage dimensions in Accomplishment Instructions (3.A.(3)(a))**Printed in Great Britain** Jan.31/12

RB211 TRENT 500 SERIES PROPULSION SYSTEMS NON-MODIFICATION SERVICE BULLETIN



# RB.211−73−G723 Transmittal - Page 1 of 3 Signed DateAll pages of Appendix 1 Page 1 of Appendix 1 To amend Fig/Item number in Accomplishment Instructions (3.A.(1)(a)), to add reference to SB 73-G738 in Accomplishment Instructions (3.A.(2)(a) and 3.A.(4)) and to correct frettage dimensions in Accomplishment Instructions (3.A.(3)(a))**Printed in Great Britain**



# RB.211−73−G723 Transmittal - Page 2LIST OF EFFECTIVE PAGES The effective pages to this Service Bulletin following incorporation of Revision 1 are as follows: Page Revision Number Revision Date

Bulletin R 1 1 Jan.31/12 R 2 1 Jan.31/12 R 3 1 Jan.31/12 R 4 1 Jan.31/12 R 5 1 Jan.31/12 R 6 1 Jan.31/12 R 7 1 Jan.31/12 R 8 1 Jan.31/12 R 9 1 Jan.31/12 R 10 1 Jan.31/12 R 11 1 Jan.31/12 R 12 1 Jan.31/12 R 13 1 Jan.31/12 R 14 1 Jan.31/12 R 15 1 Jan.31/12 Appendix 1 R 1 1 Jan.31/12**Printed in Great Britain**



# RB.211−73−G723 Transmittal - Page 31. Planning Information A. Effectivity Airbus A340 - 500/600 R RB211 TRENT 553-61 Engines RB211 TRENT 553A2-61 Engines RB211 TRENT 556-61 Engines RB211 TRENT 556A2-61 Engines RB211 TRENT 556B-61 Engines RB211 TRENT 556B2-61 Engines RB211 TRENT 560-61 Engines RB211 TRENT 560A2-61 Engines
B. Reason Low-pressure fuel leaks from the LP fuel tubes which run between the low-pressure and high-pressure fuel pumps have occurred in-service in the Trent 500 fleet. These have resulted from frettage between the securing clips and the low-pressure fuel tube outer surface, which reduces the fuel tube wall thickness, leading to fracture of the fuel tube wall and consequent fuel leak. This may cause the leakage of significant amounts of fuel and can cause IFSD and Diversion events. This Non-Modification Service Bulletin (NMSB) is designed to gather information and provide proactive mitigation for the condition. The data gathered will be used to determine root cause and define service action, if required. Revision 1 of this NMSB is issued to amend Fig/Item number in Accomplishment Instructions (3.A.(1)(a)), to add reference to SB 73-G738 in Accomplishment Instructions (3.A.(2)(a) and 3.A.(4)) and to correct frettage dimensions in Accomplishment Instructions (3.A.(3)(a)). R R R R C. Description This NMSB is issued to recommend in-shop inspection of the low-pressure fuel tubes and associated hardware. ENGINE - LP FUEL TUBES, CLIPS AND FOHE MOUNTS - INSPECTION FOR FRETTAGE - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.73-G723**Printed in Great Britain**



# RB.211−73−G723 Page 1 of 15 Sep 26/11 Jan.31/12 RAdvise your Rolls-Royce representative of NMSB accomplishment and inspection results, regardless of findings. D. Compliance
RECOMMENDED It is recommended that the action specified in 3. Accomplishment Instructions of this NMSB be carried out for the Trent 500 Engines specified in section 1.A. Effectivity as follows: In-shop: It is recommended that the actions detailed in section 3.A. (Accomplishment Instructions In-shop) be carried out at next shop visit from the release of this NMSB. E. Approval The technical content of this Non-Modification Service Bulletin was approved under the authority of Design Organisation Approval EASA.21J.035 on Sep.26/11 and re-approved on Jan.31/12. R R F. Manpower In-shop (1) Time to inspect 2.5 hours (2) Time to replace tubes (if needed) 2 hours G. Material Price and Availability Not applicable H. Tooling Price and Availability Not applicable. I. References (1) Rolls-Royce RB211 Service Bulletins: 73-F737 Engine - Fuel and Control - Fuel Tubes - LP Compressor Case - Introduction of a revised LP Fuel Tube Incorporating Rigid End Fittings**Printed in Great Britain**



# RB.211−73−G723 Page 2 Sep 26/11 Jan.31/12 R73-F738 Fuel and Control - Fuel Tubes LP Compressor Case - Introduction of revised LP Fuel Tubes Incorporating Rigid End Fittings (2) Engine Manual (a) 72-00-34-000-803, Remove the Accessories and Components from the LP Compressor Case (b) 72-00-34-400-801, Install the Accessories and Components from th LP Compressor Case (c) 72-00-34-000-802, Remove the Tubes from the LP Compressor Case (d) 72-00-34-400-802, Install the Tubes to the LP Compressor Case**Printed in Great Britain**



# RB.211−73−G723 Page 3 Sep 26/11 Jan.31/12 R2. Material Information A. Consumable OMat 2-101 Lint-free Cloth B. The following parts may be required if rejected during inspection: 73-11-47
FIG ITEM NO. PART NO. QTY PART TITLE MAT

04100 FK30710 1 Tube, assy fuel - LP pump to line disconnect, Pre SB 73-F738 -

04100A FW57604 1 Tube, assy fuel - LP pump to line disconnect, SB 73-F738 PT01 -

04104 RR188C 3 Ring, V80756, Pre SB 73-F738 -
04106 BLT5529 3 Bolt, 0.25 in. dia x 1.028, x 1.028, Pre SB 73-F738 -
04106A AS48516 3 Bolt, 0.25 in. dia x 1.000, SB 73-F738 PT01 -

04107 AS43013- 129 2 Ring, Pre SB 73-F738 -

04108 AS43013- 134 1 Ring -
04500 FW17689 1 Tube, assy fuel pump to FCOC, Pre SB 73-F738 -
04500A FW57605 1 Tube, assy fuel pump to FCOC, SB 73-F738 PT01 -
04502 AS20625 4 Nut, 0.25 in. dia - 04504 AS12944 4 Washer, 0.25 in. dia - 04506 AS48516 4 Bolt, 0.25 in. dia x 1 - 04508 AS43013 -130 1 Ring -**Printed in Great Britain**



# RB.211−73−G723 Page 4 Sep 26/11 Jan.31/12 RFIG ITEM NO. PART NO. QTY PART TITLE MAT

04512 RR188C 3 Ring, V80756, Pre SB 73-F738 -
04514 BLT5529 3 Bolt, 0.25 in. dia x 1.028, Pre SB 73-F738 -
04514A AS48516 3 Bolt, 0.25 in. dia x 1.000, Pre SB 73-F738 PT01 -

04515 AS43013 -129 2 Ring, Pre SB 73-F738 -

04516 AS43013 -134 1 Ring -
04525 AS48408 1 Bolt, 0.190 in. dia x 0.50 - 04526 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk -
04528 AS62426 1 Clip, 41.27 mm - 1.625 in. - 04532 AS20624 1 Nut, 0.190 in. dia - 04533 AS48408 1 Bolt, 0.190 in. dia x 0.50 - 04534 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk -
04536 AS62426 1 Clip, 41.27 mm - 1.625 in. - 04540 AS20624 1 Nut, 0.190 in. dia - 04541 AS48408 1 Bolt, 0.190 in. dia x 0.50 in. - 04542 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk -
04544 AS62426 1 Clip, 41.27 mm - 1.625 in. - 04548 AS20624 1 Nut, 0.190 in. dia - 04549 AS48434 1 Bolt, 0.190 in. dia x 2.125 in. -**Printed in Great Britain**



# RB.211−73−G723 Page 5 Sep 26/11 Jan.31/12 RFIG ITEM NO. PART NO. QTY PART TITLE MAT

04550 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk -
04552 AS62426 1 Clip, 41.27 mm - 1.625 in. - 04554 UP10482 1 Spacer, 25 mm - 04555 UP10480 1 Spacer, 15 mm - 04556 AS20624 1 Nut, 0.190 in. dia - 73-11-47
FIG ITEM NO. PART NO. QTY PART TITLE MAT

05100 R FK30713 R 1 Tube, assy fuel - LP R filter to line disconnect, R Pre SB 73-F737 R - R

05100A R FW57578 R 1 Tube, assy fuel - R LP filter to HP pump, R SB 73-F737 R - R

05104 R RR188C R 3 Ring, V80756, R Pre SB 73-F737 R -

05107 R AS43013 R -129 R 2 R Ring, Pre SB 73-F737 -

05108 R AS43013 R -134 R 1 R Ring -

05112 R RR188C R 3 Ring, V80756, R Pre SB 73-F737 R -

05114 R BLT5529 R 3 Bolt, 0.25 in. dia R x 1.028, Pre SB 73-F737 R -

05114A R AS48516 R 3 Bolt, 0.25 in. dia R x 1.000, SB 73-F738 PT01 R -

05115 R AS43013 R -129 R 2 R Ring, Pre SB 73-F737 -**Printed in Great Britain**



# RB.211−73−G723 Page 6 Sep 26/11 Jan.31/12 RFIG ITEM NO. PART NO. QTY PART TITLE MAT

05116 R AS43013 R -134 R 1 R Ring -

05125 R AS48408 R 1 Bolt, 0.190 in. dia x R 0.500 in. R -

05126 R K8831 R 1 Washer, 0.190 in. dia x 0.51 in. thk R R -

05128 R AS62426 R 1 Clip, 41.27 mm (1.625 in.) R - 05132 R AS20624 R 1 Nut, 0.190 in. dia R - 05133 R AS48409 R 1 Bolt, 0.190 in. dia x R 0.500 in.pre SB 73-F737 R -

05134 R K8831 R 1 Washer, 0.190 in. dia x 0.51 in. thk R R pre SB 73-F737 R -

05136 AS62426 1 Clip, 41,27 mm (1.625 in.) pre SB 73-F737 -
05149 AS48408 1 Bolt, 0.190 in. dia x 0.500 in. -
05150 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk -
05152 AS62426 1 Clip, 41,27 mm (1.625 in.) - 05157 AS48412 1 Bolt, 0.190 in. dia x 0.750 in. -
05158 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk -
05160 AS62426 1 Clip, 41,27 mm (1.625 in.) - 05162 UP10478 1 Spacer, 5mm - 05164 AS20624 1 Nut, 0.190 in. dia - 05165 AS48410 1 Bolt, 0.190 in. dia x 0.620 in. SB 73-F737 PT01 -**Printed in Great Britain**



# RB.211−73−G723 Page 7 Sep 26/11 Jan.31/12 RFIG ITEM NO. PART NO. QTY PART TITLE MAT

05166 K8831 1 Washer, 0.190 in. dia x 0.51 in. thk SB 73-F737 PT01 -

05167 AS12943 1 Washer, 0.190 in. dia SB 73-F737 PT01 -
05168 AS62426 1 Clip, 41,27 mm (1.625 in.) SB 73-F737 PT01 -
05172 AS20624 1 Nut, 0.190 in. dia SB 73-F737 PT01 -

72-34-15
FIG ITEM NO. PART NO. QTY PART TITLE MAT

05085 FK31365 1 Bracket, top mounting assy FCOC mounting - upper -
05230 FK31375 1 Bracket, bottom mount, assy FCOC brace mounting -

79-21-11
FIG ITEM NO. PART NO. QTY PART TITLE MAT

01280 FK10141 1 Bracket, assy of FCOC support strut -
01300 FK19290 1 Strut, assy FCOC support - front - 01310 UP11630 3 Spacer - 01330 FK11165 1 Bracket, assy front upper mounting - oil tank -
01400 FK19924 1 Plate, assy FCOC support - 01500 FK19264 1 Strut, assy FCOC support - lower - 01620 FK11164 1 Strut, assy FCOC support - lower -**Printed in Great Britain**



# RB.211−73−G723 Page 8 Sep 26/11 Jan.31/12 RFIG ITEM NO. PART NO. QTY PART TITLE MAT

02058 0F28-021 1 Ring, sealing - 02068 0F25-021 1 Ring, sealing - 02110 0F25-021 1 Ring, sealing -**Printed in Great Britain**



# RB.211−73−G723 Page 9 Sep 26/11 Jan.31/12 R3. Accomplishment Instructions A. In-shop

CAUTION : YOU MUST NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT-FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS. CAUTION : YOU MUST NOT PUT OIL THAT HAS COME FROM THE ENGINE BACK INTO THE OIL SYSTEM. CONTAMINATION IN THE OIL CAN CAUSE DAMAGE TO SOME PARTS OR FAILURE OF THE OIL. CAUTION : YOU MUST NOT PUT FUEL THAT HAS BEEN DRAINED FROM THE ENGINE BACK INTO THE FUEL SYSTEM. CONTAMINATION IN THE FUEL CAN CAUSE DAMAGE TO SOME PARTS. (1) Inspect FOHE mounting brackets and links (see Fig.1)
NOTE : Do not remove the FOHE from the engine and do not disconnect the oil and fuel tubes. It is acceptable to inspect the FOHE mounts and links whilst the FOHE is assembled to the engine, as long as the mounts and links are disconnected one at a time. (a) Disconnect the following FOHE mounts and links one at a time in accordance with Engine Manual Task 72-00-34-000-803: EIPC Ref. Nomenclature 79-21-11, 01-330 Bracket - Assy Front Upper Mounting - Oil Tank 79-21-11, 01-300 Strut - Assy FOHE Support - Front 79-21-11, 01-280 Bracket - Assy of FCOC Support Strut 79-21-11, 01-620 Bracket - Assy of FCOC Mounting - Lower 79-21-11, 01-500 Strut - Assy FOHE Support - Lower 79-21-11, 01-400 Plate - Assy FCOC Support 72-34-15, 05-085 Bracket 72-34-15, 05-230 R Bracket-Bottom Mount Assy FCOC Brace Mounting (b) Manipulate links and brackets that mount the FOHE to the fan case to assess the condition of the spherical bearings.**Printed in Great Britain**



# RB.211−73−G723 Page 10 Sep 26/11 Jan.31/12 RTight but not seized Accept Low friction but no play in bearings Accept Play in spherical bearings Reject and quarantine Spherical bearings seized Reject and quarantine
(c) Re-assemble the FOHE mounts and links in accordance with Engine Manual Task 72-00-34-400-801. (2) Remove and check the clips holding the LP fuel tube run from the LP fuel pump to the FOHE (EIPC 73-11-47, 04-100 and 73-11-47, 04-500, see Fig.2) and the clips holding the LP fuel tube run from the LP filter to the HP fuel pump (EIPC 73-11-47, 05-100, see Fig.3). (a) Visually check each of the clips for obvious evidence of damage that may have affected the fuel tubes (e.g. significant damage to rubber and/or dust/debris at location of clip): Pre SB 73-F737 and pre SB 73-G738 R Engines: Inspect the clipping points 100181, 102321, 100282, 100187, 102252, 100178, 100180, 102259, 102321, 100186 and 102260. SB 73-F737 and SB 73-G738 R Engines: Inspect the clipping points 100181, 102321, 100282, 102374, 102252, 100178, 100180, 102259, 102321, 102373 and 102260. (b) Remove, inspect and replace (as necessary) each retaining clip one at a time, start from either top or bottom of the tube run.
NOTE : This is to prevent alteration to the system alignment and stressing of the tube and clips.
NOTE : During removal of the clip look for any significant relaxation or strain that suggests poor alignment of the tubes and stressing of certain clipping positions. If necessary loosen adjacent clips and carefully manipulate the tube alignment to minimize any strain in the system. Make a note if alignment issues are seen. (c) Visually inspect the clips and report all the observations in the Proforma (see Appendix 1) Obvious excessive damage Photograph and reject Cracked Distressed Rubber Photograph and reject**Printed in Great Britain**



# RB.211−73−G723 Page 11 Sep 26/11 Jan.31/12 RWorn/damaged internal diameter of rubber Photograph and reject

Evidence of internal corrosion/wear /material transfer to the tube surface (powdery deposits at ends of rubber section) Photograph and reject

(3) Inspect the LP fuel tube run from the LP fuel pump to the FOHE (EIPC 73-11-47, 04-100 and 73-11-47, 04-500, see Fig.2) and the LP fuel tube run from the LP filter to the HP fuel pump (EIPC 73-11-47, 05-100, see Fig.3). (a) Visually check the fuel tubes surface near p-clips location for evidence of damage/wear.
NOTE : Take particular care to inspect the entire exposed surface of the tube, a mirror may be used in areas where direct line of sight access is difficult. Reject and replace the tube if evidence of contact frettage to a depth of greater than 0.1 mm (0.004 in.) on the outer surface of a bend or 0.2 R mm (0.008 in.) in any other area is evident. If a pipe is rejected then quarantine the part and record the finding in Appendix 1. (b) If the fuel tube is rejected, remove it in accordance with EM Task 72-00-34-000-802 and replace it with new in accordance with EM Task 72-00-34-400-802. (4) Replace the rejected p-clips with new. Re-install all the clipping points: Pre SB 73-F737 and pre SB 73-G738 R Engines: Install the clipping points 100181, 102321, 100282, 100187, 102252, 100178, 100180, 102259, 102321, 100186 and 102260 SB 73-F737 and SB 73-G738 R Engines: Install the clipping points 100181, 102321, 100282, 102374, 102252, 100178, 100180, 102259, 102321, 102373 and 102260 (5) A record of accomplishment is required (see Appendix 1).**Printed in Great Britain**



# RB.211−73−G723 Page 12 Sep 26/11 Jan.31/12 RFuel Oil Heat Exchanger Fig.1**Printed in Great Britain**



# RB.211−73−G723 Page 13 Sep 26/11 Jan.31/12 RFuel Tubes LP Compressor Case Fig.2**Printed in Great Britain**



# RB.211−73−G723 Page 14 Sep 26/11 Jan.31/12 RFuel Tubes LP Compressor Case Fig.3**Printed in Great Britain**



# RB.211−73−G723 Page 15 Sep 26/11 Jan.31/12 RThis form (or similar) to be completed for every engine/component inspected results to be sent to Rolls-Royce via your Service Representative

Feedback Sheet NMSB 73-G723 Date: Operator: Engine Serial Number: Aircraft: Hours Cycles Engine Life: Life since last shop visit: Life since embodiment of SB 79-AG346: Life since embodiment of SB 73-F737 (if applicable): Life since embodiment of SB 73-F738 (if applicable): Fuel Tubes Condition Observations (material transfer from clips/fretted/dented/worn-please specify depth) FW57605 (SB 73-F738) FW17689 (pre SB 73-F738) FW57604 (SB 73-F738) FK30710 (pre SB 73-F738) FW57578 (SB 73-F737) FK30713 (pre SB 73-F737) Clips Condition Observations (material transfer/dust/worn/cracked/metal band exposed) 102252 100178 100180 102259 102321 100186 102260 100181 102321 100282 102374 (SB 73-F737) 100187 (pre SB 73-F737)

FOHE Mounts Condition Observations (tight/seized/play in spherical bearings/sperical bearings seized) FK10141 FK19290 FK11165 FK19924 FK19264 FK11164 NOTES: APPENDIX 1**Printed in Great Britain**



# RB.211−73−G723 Appendix 1 - Page 1 of 1 Sep 26/11 Jan.31/12 R