LIST OF EFFECTIVE PAGES The effective pages to this Service Bulletin are as follows: Page Revision Number Revision Date

Bulletin 1 Sep.28/12 2 Sep.28/12 3 Sep.28/12 4 Sep.28/12 5 Sep.28/12 6 Sep.28/12 7 Sep.28/12 8 Sep.28/12 9 Sep.28/12 10 Sep.28/12 11 Sep.28/12 12 Sep.28/12 13 Sep.28/12 14 Sep.28/12 15 Sep.28/12 16 Sep.28/12 17 Sep.28/12 18 Sep.28/12 19 Sep.28/12 20 Sep.28/12 21 Sep.28/12 22 Sep.28/12 23 Sep.28/12 24 Sep.28/12 25 Sep.28/12 26 Sep.28/12 27 Sep.28/12 28 Sep.28/12 29 Sep.28/12 30 Sep.28/12 31 Sep.28/12 32 Sep.28/12 33 Sep.28/12 34 Sep.28/12 35 Sep.28/12 36 Sep.28/12 37 Sep.28/12 38 Sep.28/12 39 Sep.28/12 40 Sep.28/12 41 Sep.28/12 42 Sep.28/12 43 Sep.28/12 Appendix 1**Printed in Great Britain**



# RB.211−73−AG948 Transmittal - Page 21 Sep.28/12**Printed in Great Britain**



# RB.211−73−AG948 Transmittal - Page 31. Planning Information A. Effectivity Airbus A340 - 500/600 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 Problem Low Pressure (LP) fuel leaks from the LP fuel tubes between the combined LP/HP (Low Pressure/High Pressure) Fuel Pump and the Fuel/Oil Heat Exchanger (FOHE) have occurred in-service in the Trent 500 fleet. Movement of the FOHE mounts due to wear allows the fuel tubes to move excessively within the clipping points. This has resulted in excessive wear of the rubber section of the P-clips, and the subsequent frettage between the exposed metal band and the fuel tubes. The frettage reduces the fuel tube outer wall thickness, leading to fracture of the fuel tube and the consequent fuel leak. This may cause the leakage of significant amounts of fuel and can cause In-Flight Shut Down (IFSD) and diversion events. This Non-Modification Service Bulletin (NMSB) is designed to address the condition for both in-shop engines and those installed on-wing. NMSB 73-AG797 and NMSB 73-G723 were used to gather information and to define the inspection interval that is instructed in this document. C. Description This NMSB is issued to recommend on-wing and in-shop inspection of LP fuel tubes, P-clips and FOHE mounts. ENGINE - LP FUEL TUBES, CLIPS AND FOHE MOUNTS - INSPECTION FOR FRETTAGE - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.73-AG948**Printed in Great Britain**



# RB.211−73−AG948 Page 1 of 43 Sep.28/12 Sep.28/12Advise your local Rolls-Royce representative of NMSB accomplishment. Record inspection results in the table provided (Appendix 1) or similar and provide to Rolls-Royce if any rectification action was required. D. Compliance
ALERT This Non-Modification Service Bulletin is anticipated to be the subject of an EASA Airworthiness Directive. (1) On-wing Complete the actions detailed in 3.A. Accomplishment Instructions at the following intervals: (a) Inspect within 6000 hours from either (which ever was accomplished most recently): (i) The embodiment of SB 73-F737 or SB 73-F738 (which ever was embodied first) (ii) The last fuel tube inspection in accordance with NMSB 73-AG797 or NMSB 73-G723 (which ever was embodied last) (b) Following initial inspection, repeat the inspection at intervals not exceeding 6000 engine flying hours. (2) In-shop Complete the actions detailed in 3.B. Accomplishment Instructions. Inspect at all shop visits, post the issue of this bulletin. 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.27/12. F. Manpower (1) On-wing (a) Time to gain access 0.5 man hours (b) Time to inspect 4 man hours**Printed in Great Britain**



# RB.211−73−AG948 Page 2 Sep.28/12 Sep.28/12(c) Time to replace tubes (if needed; includes Test 2 - The Fuel and Oil Leak Test) 6 man hours if replacing with the same part 10 man hours if embodiment of SB 73-F737 is required 30 man hours if embodiment of SB 73-F738 is required (d) Time to restore to serviceable condition 0.5 man hours (2) In-shop (a) Time to inspect 4 man hours (b) Time to replace tubes (if needed; includes Test 2 - The Fuel and Oil Leak Test) 6 man hours if replacing with the same part 10 man hours if embodiment of SB 73-F737 is required 30 man hours if embodiment of SB 73-F738 is required G. Material Price and Availability Not affected. H. Tooling Price and Availability Special tools are not required. I. References (1) Rolls-Royce RB211 Service Bulletins: (a) 73-F737 Engine - Fuel and Control - Fuel Tubes - LP Compressor Case - Introduction of a revised LP Fuel Tube Incorporating Rigid End Fittings (b) 73-F738 Fuel and Control - Fuel Tubes - LP Compressor Case - Introduction of revised LP Fuel Tubes Incorporating Rigid End Fittings**Printed in Great Britain**



# RB.211−73−AG948 Page 3 Sep.28/12 Sep.28/12(2) Rolls-Royce RB211 Non-Modification Service Bulletins: (a) 73-G723 Engine - LP Fuel Tubes, Clips and FOHE Mounts - Inspection for Frettage - Non-Modification Service Bulletin (b) 73-AG797 Engine - LP Fuel Tubes and Clips - Inspection for Frettage - Non-Modification Service Bulletin (3) Engine Manual: 72-00-34, LP Compressor Case Module, Removal and Installation 72-34-00, LP Compressor Case Module, Assembly and Disassembly (4) Engine Illustrated Parts Catalogue: 72-34-15, LP Compressor Rear Case 72-35-16, LP Compressor Case Accessories Mounts 73-11-47, Fuel Tubes, LP Compressor Case 79-21-11, Fuel Oil Heat Exchanger (5) Aircraft Maintenance Manual 70-12-01, Removal/Installation of Rigid Tubes 71-00-00, Power Plant - General 71-13-00, Fan Cowl - Maintenance Practices 79-22-41, Heat Exchanger Fuel/Oil, Removal/Installation**Printed in Great Britain**



# RB.211−73−AG948 Page 4 Sep.28/12 Sep.28/122. Material Information A. The following parts may be required if rejected during inspection: 72-34-15 FIG/ITEM NO. PART NO. QTY PART TITLE MAT 05070 FW22292 1 Bracket, assy support, front - 05085 FK31365 1 Bracket, top mounting assy FCOC mounting - upper - 05180 FK32651 1 Bracket, assy accessory mounting - 05215 FK31492 1 Bracket - 05230 FK31375 1 Bracket, bottom mount, assy FCOC brace mounting - 05245 FK17275 1 Bracket - 05260 FK12473 1 Bracket, assy - 72-34-15 FIG/ITEM NO. PART NO. QTY PART TITLE MAT

06102 AS20626 7 Nut, 0.3125 in. dia - 06108 B485850 14 Washer - 06119 AS48619 1 Bolt, 0.3125 in.dia x 1.188- 06125 AS48625 4 Bolt, 0.3125-24UNJF x 1.562- 06131 AS48631 2 Bolt, 0.3125-24UNJF x 1.938- 72-35-16 FIG/ITEM NO. PART NO. QTY PART TITLE MAT 05094 AS48512 2 Bolt, Bihex HD, 0.250 in.dia x 0.748 - 05095 FEB5031 1 Strap, bonding upper - FCOC to rear fancase, VU5082 - 05096 AS20625 2 Nut, 0.250 in.dia - 05097 AS12944 5 Washer, 0.250 in.dia - 05098 AS48520 1 Bolt, 0.250 in.dia x 1.250 - 05099 SP124G 1 Washer - 05445 FEB5032 1 Strap, bonding lower - FCOC to rear fancase, VU5082 - 05446 AS20624 1 Nut, 0.190 in.dia - 05447 AS12943 1 Washer, 0.190 in.dia - 05448 AS48409 1 Bolt, 0.190 in.dia x 0.562 in. -**Printed in Great Britain**



# RB.211−73−AG948 Page 5 Sep.28/12 Sep.28/1273-11-47 FIG/ITEM NO. PART NO. QTY PART TITLE MAT

04100 FK30710 1 Tube, assy fuel - LP pump to line disconnect, pre SB73-F738 -
04100A FW57604 1 Tube, assy fuel - LP pump to line disconnect, SB73-F738 PT01 -
04104 RR188C 3 Ring, V80756, pre SB73-F738 - 04106 BLT5529 3 Bolt, 0.25 in.dia x 1.028, pre SB73-F738 - 04106A AS48516 3 Bolt, 0.25 in.dia x 1.000, SB73-F738 PT01 - 04107 AS43013- 129 2 Ring, pre SB73-F738 - 04108 AS43013- 134 1 Ring - 04117 K16738 1 Connector, pre SB73-F738 - 04125 AS48410 1 Bolt, 0.190 in.dia x 0.625, pre SB73-F738 - 04126 K8831 1 Washer, 0.190 in.dia x 0.51 thk - 04127 AS12943 1 Washer, 0.190 in. dia - 04128 AS62426 1 Clip, 41.27mm (1.625) - 04132 AS20624 1 Nut, 0.190 in.dia - 04133 AS48415 1 Bolt, 0.190 in. dia x 0.938 - 04134 K8831 1 Washer, 0.190 in.dia x 0.51 thk - 04136 AS62426 1 Clip, 41.27mm (1.625) - 04138 UP10479 1 Spacer, 10mm - 04140 AS20624 1 Nut, 0.190 in. dia - 04202 LK30233 1 Ferrule, Seal Carrier, Pre SB73-F738 - 04202A FW57169 1 Adaptor, Flanged SB73-F738 PT01 - 04208 LK29963 1 Retainer, Ferrulem Pre SB73-F738 - 04242 UP10968 1 Adaptor, Flanged - 04500 FW17689 1 Tube, assy fuel pump to FCOC, pre SB73-F738 - 04500A FW57605 1 Tube, assy fuel pump to FCOC, SB73-F738 PT01 - 04502 AS20625 4 Nut, 0.190 in. dia - 04504 AS12944 4 Washer, 0.25 in.dia - 04506 AS48516 4 Bolt, 0.25 in.dia x 1.000 - 04508 AS43013- 130 1 Ring - 04512 RR188C 3 Ring, V80756, pre SB73-F738 -**Printed in Great Britain**



# RB.211−73−AG948 Page 6 Sep.28/12 Sep.28/1204514 BLT5529 3 Bolt, 0.25 in.dia x 1.028, pre SB73-F738 - 04514A AS48516 3 Bolt, 0.25 in.dia x 1.000, pre SB73-F738 PT01 - 04515 AS43013- 129 2 Ring, pre SB73-F738 - 04516 AS43013- 134 1 Ring - 04517 K16738 1 Connector, pre SB73-F738 - 04525 AS48408 1 Bolt, 0.190 in. dia x 0.50 - 04526 K8831 1 Washer, 0.190 in. dia x 0.51 thk - 04528 AS62426 1 Clip, 41.27mm (1.625) - 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 thk - 04536 AS62426 1 Clip, 41.27 mm (1.625) - 04540 AS20624 1 Nut, 0.190 in. dia - 04541 AS48408 1 Bolt, 0.190 in. dia x 0.50 - 04542 K8831 1 Washer, 0.190 in.dia x 0.51 thk - 04544 AS62426 1 Clip, 41.27 mm (1.625) - 04548 AS20624 1 Nut, 0.190 in. dia - 04549 AS48434 1 Bolt, 0.190 in. dia x 2.125 - 04550 K8831 1 Washer, 0.190 in. dia x 0.51 thk - 04552 AS62426 1 Clip, 41.27 mm (1.625) - 04554 UP10482 1 Spacer, 25 mm - 04555 UP10480 1 Spacer, 15 mm - 04556 AS20624 1 Nut, 0.190 in. dia - 04602 UP10969 1 Adapter, Flanged-recessed - 04614 UP11132 1 Adapter, 1.625 in. dia tube - 04638 LK29963 1 Retainer, Ferrule, pre SB73-F738 - 04642 LK30233 1 Ferrule, Seal carrier, pre SB73-F738 - 04642A FW57169 1 Adapter, Flanged, SB73-F738 PT01 -

73-11-47 FIG/ITEM NO. PART NO. QTY PART TITLE MAT

05070 FW11124 1 Bracket - 05100 FK30713 1 Tube, assy fuel, LP filter to line disconnect, pre SB 73-F737 -
05100A FW57578 1 Tube, assy fuel, LP filter to HP pump, SB 73-F737 -**Printed in Great Britain**



# RB.211−73−AG948 Page 7 Sep.28/12 Sep.28/1205104 RR188C 3 Ring, V80756, pre SB 73-F737 - 05106 BLT5529 3 Bolt, 0.250 in. dia x 1.028 in. pre SB 73-F737 - 05106A AS48516 3 Bolt, 0.250 in. dia x 1.000 in. SB 73-F737 PT01 - 05107 AS43013- 129 2 Ring, pre SB 73-F737 - 05108 AS43013- 134 1 Ring - 05112 RR188C 3 Ring, V80756, pre SB 73-F737 - 05114 BLT5529 3 Bolt, 0.25 in. dia x 1.028, pre SB 73-F737 - 05114A AS48516 3 Bolt, 0.25 in. dia x 1.000, SB 73-F738 PT01 - 05115 AS43013- 129 2 Ring, pre SB 73-F737 - 05116 AS43013- 134 1 Ring - 05117 K16738 2 Connector, pre SB 73-F737 - 05125 AS48408 1 Bolt, 0.190 in. dia x 0.500- 05126 K8831 1 Washer, 0.190 in. dia x 0.51 thk - 05128 AS62426 1 Clip, 41.27 mm (1.625) - 05132 AS20624 1 Nut, 0.190 in. dia - 05133 AS48409 1 Bolt, 0.190 in. dia x 0.500 pre SB 73-F737 - 05134 K8831 1 Washer, 0.190 in. dia x 0.51 thk, pre SB73-F737 - 05136 AS62426 1 Clip, 41,27 mm (1.625) pre SB 73-F737 - 05149 AS48408 1 Bolt, 0.190 in. dia x 0.500- 05150 K8831 1 Washer, 0.190 in. dia x 0.51 thk - 05152 AS62426 1 Clip, 41.27 mm (1.625) - 05156 AS20624 1 Nut, 0.190 in. dia - 05157 AS48412 1 Bolt, 0.190 in. dia x 0.750- 05158 K8831 1 Washer, 0.190 in. dia x 0.51 thk - 05160 AS62426 1 Clip, 41,27 mm (1.625) - 05162 UP10478 1 Spacer, 5 mm - 05164 AS20624 1 Nut, 0.190 in. dia - 05165 AS48410 1 Bolt, 0.190 in. dia x 0.620 SB 73-F737 PT01 - 05166 K8831 1 Washer, 0.190 in. dia x 0.51 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) SB 73-F737 PT01 -**Printed in Great Britain**



# RB.211−73−AG948 Page 8 Sep.28/12 Sep.28/1205172 AS20624 1 Nut, 0.190 in. dia SB 73-F737 PT01 - 05202 LK30233 1 Ferrule, Seal carrier, pre SB 73-F737 - 05202A FW57169 1 Adapter, Flanged, SB 73-F737 PT01 - 05208 LK29963 1 Retainer, Ferrule, pre SB 73-F737 - 05238 LK29963 1 Retainer, Ferrule, pre SB 73-F737 - 05242 LK30233 1 Ferrule, Seal carrier, pre SB 73-F737 - 05242A FW57169 1 Adapter, Flanged, SB 73-F737 -

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

01015 FK19654 1 Bracket, angle bonding lead - 01030 55027001-1 1 Cooler, Oil-Fuel Cooled (5002EN), VSG215, pre SB 79-E371 -

01030A 55027001- 11 1 Cooler, Oil-Fuel Cooled (5002EN), VSG215, SB 79-E371 PT01, pre SB 79-G346 -

01030B 55027001- 21 1 Cooler, Oil-Fuel Cooled (5002EN), VSG215, SB 79-G346 PT01 -
01031 AS20626 1 Nut, 0.3125 in. dia - 01035 AS54722 1 Bolt - 01036 BLT5477 2 Bolt, 0.3125 in. dia x 1.240 - 01037 AS12945 2 Washer - 01070 AS20626 1 Nut, 0.3125 in. dia - 01072 AS12945 1 Washer - 01074 AS54746 1 Bolt - 01280 FK10141 1 Bracket, assy of FCOC support strut - 01282 BLT5477 2 Bolt, 0.3125 in. dia x 1.240 - 01284 AS12945 2 Washer - 01300 FK19290 1 Strut, assy FOHE support - Front - 01302 AS20626 1 Nut, 0.3125 in. dia - 01306 AS54722 1 Bolt - 01310 UP11630 3 Spacer - 01330 FK11165 1 Bracket, assy front upper mounting - oil tank -**Printed in Great Britain**



# RB.211−73−AG948 Page 9 Sep.28/12 Sep.28/1201334 AS20626 2 Nut, 0.3125 in. dia - 01336 AS48618 2 Bolt, 0.3125 in. dia x 1.125 - 01338 B485850 4 Washer - 01400 FK19924 1 Plate, assy FCOC support - 01402 AS20626 1 Nut, 0.3125 in. dia - 01404 AS54722 1 Bolt - 01500 FK19264 1 Strut, assy FOHE support - Lower - 01502 AS20626 2 Nut, 0.3125 in. dia - 01504 AS54722 2 Bolt - 01560 FK31369 1 Link, upper assy support - FCOC - 01562 AS20626 1 Nut, 0.3125 in. dia - 01564 AS54722 1 Bolt - 01580 FK31371 1 Link, upper assy FOHE support - 01615 FW11126 1 Bracket - 01620 FW11164 1 Strut, assy FCOC support - Lower - 01622 AS20626 2 Nut, 0.3125 in. dia - 01624 AS48618 1 Bolt, 0.3125 in. dia x 1.125 - 01626 B485850 4 Washer - 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−AG948 Page 10 Sep.28/12 Sep.28/123. Accomplishment Instructions A. On-wing - Inspect the fuel tubes (Part Nos.: FW57605/FW17689, FW57604/FK30710 and FW57578/FK30713), P-clips and FOHE mounting hardware for wear/damage/frettage. Refer to Fig.1 thru Fig.21.

WARNING : YOU MUST BE CAREFUL WHEN YOU WORK ON THE ENGINE AFTER THE ENGINE IS SHUTDOWN. THE ENGINE CAN STAY HOT FOR ALMOST ONE HOUR.
WARNING : YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE INJURY. IF YOU GET AN INJURY, PUT IT IN COLD WATER FOR 10 MINUTES. THEN GET MEDICAL AID.
CAUTION : IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN-FLIGHT SHUT DOWN, POWER LOSS, OR OTHER ANOMALY DUE TO MAINTENANCE ERROR, ROLLS-ROYCE 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 AT THE SAME TIME, ROLLS-ROYCE RECOMMENDS THAT ADDITIONAL CONTROLS ARE APPLIED IN ORDER TO ENSURE THAT MAINTENANCE TASKS HAVE BEEN COMPLETED AS DEFINED. MAINTENANCE GUIDELINES SHOULD BE REVISED, WHERE POSSIBLE, TO PROMOTE THIS RECOMMENDATION. (1) Get access (a) Open the fan cowl doors; refer to Aircraft Maintenance Manual (AMM) Task 71-13-00. (i) For 4040EM1: 415AL 416AR (ii) For 4040EM2: 425AL 426AR (iii) For 4040EM3: 435AL 436AR (iv) For 4040EM4: 445AL 446AR (2) Put suitable access platform into a safe position.**Printed in Great Britain**



# RB.211−73−AG948 Page 11 Sep.28/12 Sep.28/12CAUTION : 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. (3) Visually inspect fuel tubes (EIPC 73-11-47, Fig/Item No.04-500A/04-500, 04-100A/04-100 and 05-100A/05-100) and the relevant clipstacks for damage/wear. Refer to Fig.1 thru Fig.16. Record inspection results in the table provided (Appendix 1) or similar and provide to Rolls-Royce if any rectification action was required.
CAUTION : INSPECTION OF THE CLIPS MUST BE DONE ONE AT A TIME TO PREVENT ALTERATION TO THE SYSTEM ALIGNMENT AND STRESSING OF THE TUBES AND CLIPS (a) During removal of the clips look for any significant relaxation of 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 minimise any strain in the system. Make a note on the proforma (Appendix 1) or similar if alignment issues are seen. (b) Visually inspect all the clips for obvious evidence of wear that may have damaged the fuel tubes (for example, significant wear to rubber and/or dust/debris at location of clip). (i) Remove any obviously damaged clip(s) first (one at a time) and inspect fuel tube(s) in accordance with criteria as specified in steps 3.A.(3)(f) and 3.A.(3)(g). (ii) If clip(s) and/or fuel tube(s) are found to be unserviceable, remove and replace in accordance with step 3.A.(3)(h). (c) Remove and inspect each remaining clip one at a time (positions specified in steps 3.A.(3)(c)(i) and 3.A.(3)(c)(ii)) in accordance with the criteria as specified in step 3.A.(3)(f). Start from either the top or bottom of the tube run. (i) LP - FOHE tube run clipping positions: CP102252, CP100178, CP100180, CP102259, CP102321, CP102373 (SB 73-F738) / CP100186 (pre SB 73-F738), CP102260. (ii) FOHE - HP tube run clipping positions: CP100181, CP102321, CP100282, CP102374 (SB 73-F737) / CP100187 (pre SB 73-F737).**Printed in Great Britain**



# RB.211−73−AG948 Page 12 Sep.28/12 Sep.28/12(d) Inspect the fuel tube around the area which the clip was fitted in accordance with the criteria as specified in step 3.A.(3)(g). (i) If fuel tube is found to be serviceable, reinstall or replace clip in accordance with step 3.A.(3)(h). (ii) If fuel tube is found to be unserviceable, replace in accordance with step 3.A.(3)(h). (e) Make sure clip and tube are returned to an acceptable condition before moving to the next clipping point. (f) P-clip acceptance and rejection criteria Obvious excessive damage Reject Cracked Distressed Rubber Reject Worn/damaged internal diameter of rubber Reject Metal band exposure Reject Evidence of corrosion/wear/ material transfer to the tube surface (powder/dust deposits at ends of rubber section) Reject

(g) Fuel tube acceptance and rejection criteria Contact frettage to a depth greater than 0.1 mm (0.004 in.) on the outer surface of a bend on the tube Reject

Contact frettage to a depth greater than 0.2 mm (0.008 in.) in any other area of the tube Reject

NOTE : Take particular care to inspect the entire exposed surface of the tube. A mirror can be used in areas where direct line of sight access is difficult. (h) If a clip or fuel tube is rejected, remove and replace it in accordance with Aircraft Maintenance Manual 70-12-01. Refer to Service Bulletins 73-F737 and SB73-F738 for specific installation instructions and Fig.1 thru Fig.16 for tube and clipping point details.**Printed in Great Britain**



# RB.211−73−AG948 Page 13 Sep.28/12 Sep.28/12(4) Inspect all FOHE mounts and associated hardware for signs of obvious damage and excessive wear. Refer to Fig.17 thru Fig.21. Record inspection results in the table provided (Appendix 1) or similar and provide to Rolls-Royce if any rectification action was required.
NOTE : It is not necessary to remove the FOHE from the engine or disconnect the oil and fuel tubes. It is acceptable to inspect the FOHE mounts and associated hardware when the FOHE is installed on the engine
NOTE : The FOHE mounts, links and brackets can be removed, inspected and replaced one at a time.
NOTE : The purpose of this inspection is to identify noticeable play in the spherical bearing of the FOHE mounts. In most cases this can be done in situ without removing hardware, by manipulating the FOHE and mounts. If wear is suspected then remove the bolt at one end of the link/strut for more detailed assessment. (a) Disconnect the following FOHE mounts and links one at a time in accordance with Aircraft Maintenance Manual 79-22-41 and examine by manipulation and visual inspection in accordance with the criteria as specified in step 3.A.(4)(b). EIPC Ref Part No. Description 79-21-11, 01-280 FK10141 Bracket, assy of FCOC support strut 79-21-11, 01-300 FK19290 Strut, assy FOHE support - Front 79-21-11, 01-330 FK11165 Bracket, assy front upper mounting - Oil tank 79-21-11, 01-400 FK19924 Plate, assy FCOC support 79-21-11, 01-500 FK19264 Strut, assy FCOC support - Lower 79-21-11, 01-620 FK11164 Bracket, assy FCOC mounting - Lower 72-34-15, 05-085 FK31365 Bracket, top mounting assy FCOC mounting - Upper 72-34-15, 05-230 FK31375 Bracket, bottom mount assy, FCOC brace mounting
NOTE : If replacement of damaged parts is not possible during inspection then they can be replaced within 800 flight hours. (b) FOHE mounting hardware acceptance and rejection criteria: Bearings tight but not seized Accept Low friction but no play in bearings Accept**Printed in Great Britain**



# RB.211−73−AG948 Page 14 Sep.28/12 Sep.28/12Minor scratches/score marks Accept Play in spherical bearings Replace within 800 flight hours Spherical bearings seized Replace within 800 flight hours Bent or twisted Replace within 800 flight hours (5) If fancase mounting bracket, 72-34-15, 05-230, 79-21-11, 01-330 or 01-620 (FK31375, FK11165 or FK11164) are found to be unserviceable, remove and replace in accordance with the following instructions. Refer to Fig.20 and Fig.21. (a) Remove and install the bracket (79-21-11, 01-330). Refer to Fig.20. (i) Remove the brackets at location A. (1) Release and remove the bolts, washers and nuts that attach the bracket to the LP compressor case flange FD. (2) Remove the bracket. (3) Attach the bracket (79-21-11, 01-330) to the rear of the LP compressor case flange FD with the bolts (79-21-11, 01-336), the washers (79-21-11, 01-338) and the nuts (79-21-11, 01-334). (ii) Torque the nuts (79-21-11, 01-334) to 32,2 Nm (285 lbfin). (b) Remove and install the brackets (79-21-11, 01-620) and (79-21-11, 01-615). Refer to Fig.20. (i) Remove the brackets at location A. (1) Release and remove the bolts, washers and nuts that attach the brackets to the LP compressor case flange FD. (2) Remove the brackets. (3) Attach the bracket (79-21-11, 01-620) to the rear of the LP compressor case flange FD and the bracket (79-21-11, 01-615) to the front of the LP compressor case flange FD, with the bolts (79-21-11, 01-624), the washers (79-21-11, 01-626) and the nuts (79-21-11, 01-622). (ii) Torque the nuts (79-21-11, 01-622) to 32,2 Nm (285 lbfin).**Printed in Great Britain**



# RB.211−73−AG948 Page 15 Sep.28/12 Sep.28/12(c) Remove and install the brackets (72-34-15, 05-260), (72-34-15, 05-245), (72-34-15, 05-230), (72-34-15, 05-215) and (72-34-15, 05-180) at position A. Refer to Fig.21. (i) Remove the brackets at position A. (1) Release and remove the bolts, washers and nuts that attach the brackets to the LP compressor case flange FE. (2) Remove the brackets. (3) Attach the brackets (72-34-15, 05-260), (72-34-15, 05-245), (72-34-15, 05-230), (72-34-15, 05-215) and (72-34-15, 05-180) to the LP compressor case flange FE with the four bolts (72-34-15, 06-125), eight washers (72-34-15, 06-108) and four nuts (72-34-15, 06-102). (ii) Torque the four nuts (72-34-15, 06-102) to 32,2 Nm (285 lbfin). (6) Reassemble the FOHE mounts and links in accordance with Aircraft Maintenance Manual 79-22-41. (7) Remove the access platform. (8) If any tube is replaced, do a leak check of the fuel oil heat exchanger installation in accordance with Aircraft Maintenance Manual 71-00-00, Test No.2, The Fuel and Oil Leak Test. (9) For each fuel tube, make sure there is a 5 mm minimum clearance from any adjacent tubes and hardware. If necessary loosen adjacent clips and carefully manipulate the tube alignment to achieve the necessary clearance. (10) Close access: (a) Make sure that the work area is clean and clear of tools and other items. (b) Close the fan cowl doors in accordance with Aircraft Maintenance Manual (AMM) 71-13-00. (i) For 4040EM1: 415AL 416AR (ii) For 4040EM2: 425AL 426AR (iii) For 4040EM3: 435AL 436AR (iv) For 4040EM4: 445AL 446AR**Printed in Great Britain**



# RB.211−73−AG948 Page 16 Sep.28/12 Sep.28/12B. At shop visit - Inspect the fuel tubes (EIPC 73-11-47, 04/500A/04-500, 04-100A/04-100 and 05-100A/05-100) P-clips and FOHE mounting hardware for wear/damage/frettage. Refer to Fig.1 thru Fig.21. (1) Visually inspect the fuel tubes (EIPC 73-11-47, Fig/Item Nos. 04/500A/04-500, 04-100A/04-100 and 05-100A/05-100) P-clips and FOHE mounting hardware for damage/wear. Refer to Fig.1 thru Fig.16. Record inspection results in the table provided (Appendix 1) or similar and provide to Rolls-Royce if any rectification action was required.
CAUTION : INSPECTION OF THE CLIPS MUST BE DONE ONE AT A TIME TO PREVENT ALTERATION TO THE SYSTEM ALIGNMENT AND STRESSING OF THE TUBES AND CLIPS (a) During removal of the clips look for any significant relaxation of 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 minimise any strain in the system. Make a note on the proforma (Appendix 1) or similar if alignment issues are seen. (b) Visually inspect all the clips for obvious evidence of wear that may have damaged the fuel tubes (for example, significant wear to rubber and/or dust/debris at location of clip). (i) Remove any obviously damaged clip(s) first and inspect fuel tube(s) in accordance with the criteria as specified in steps 3.B.(1)(f) and 3.B.(1)(g). (ii) If clip(s) and/or fuel tube(s) are found to be unserviceable, remove and replace in accordance with step 3.B.(1)(h). (c) Remove and inspect each remaining clip one at a time (positions specified in 3.B.(1)(c)(i) and 3.B.(1)(c)(ii)) in accordance with the criteria as specified in step 3.B.(1)(f). Start from either the top or the bottom of the tube run. (i) LP - FOHE tube run clipping positions: CP102252, CP100178, CP100180, CP102259, CP102321, CP102373 (SB 73-F738) / CP100186 (pre SB 73-F738), CP102260. (ii) FOHE - HP tube run clipping positions: CP100181, CP102321, CP100282, CP102374 (SB 73-F737) / CP100187 (pre SB 73-F737). (d) Inspect the fuel tube around the area which the clip was fitted in accordance with criteria as specified in step 3.B.(1)(g). (i) If fuel tube is found to be serviceable, reinstall or replace clip in accordance with step 3.B.(1)(h).**Printed in Great Britain**



# RB.211−73−AG948 Page 17 Sep.28/12 Sep.28/12(ii) If fuel tube is found to be unserviceable, replace in accordance with step 3.B.(1)(h). (e) Make sure clip and tube are returned to an acceptable condition before moving to the next clipping point. (f) P-clip acceptance and rejection criteria Obvious excessive damage Reject Cracked Distressed Rubber Reject Worn/damaged internal diameter of rubber Reject Metal band exposure Reject Evidence of corrosion/wear/ material transfer to the tube surface (powder/dust deposits at ends of rubber section) Reject

(g) Fuel tube acceptance and rejection criteria Contact frettage to a depth greater than 0.1 mm (0.004 in.) on the outer surface of a bend on the tube Reject

Contact frettage to a depth greater than 0.2 mm (0.008 in.) in any other area of the tube Reject

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. (h) If a clip or fuel tube is rejected, remove and replace it in accordance with Engine Manual 72-00-34. Refer to Fig.1 thru Fig.16 for tube and clipping point details.**Printed in Great Britain**



# RB.211−73−AG948 Page 18 Sep.28/12 Sep.28/12(2) Inspect all FOHE mounts and associated hardware for signs of obvious damage and excessive wear. Refer to Fig.17 thru Fig.21. Record inspection results in the table provided (Appendix 1) or similar and provide to Rolls-Royce if any rectification action was required.
NOTE : It is not necessary to remove the FOHE from the engine or disconnect the oil and fuel tubes. It is acceptable to inspect the FOHE mounts and associated hardware whilst the FOHE is assembled to the engine.
NOTE : FOHE mounts/links/brackets can be removed, inspected and replaced one at a time
NOTE : The purpose of this inspection is to identify noticeable play in the spherical bearing of the FOHE mounts. In most cases this can be done without removing hardware, by manipulating the FOHE and mounts. If wear is suspected then remove the bolt at one end of the link/strut for more detailed assessment. (a) Disconnect the following FOHE mounts and links one at a time in accordance with Engine Manual 72-00-34 and 72-34-00 and examine by manipulation and visual inspection in accordance with the criteria as specified in step 3.B.(2)(b). EIPC Ref Part No. Description 79-21-11, 01-280 FK10141 Bracket, assy of FCOC support strut 79-21-11, 01-300 FK19290 Strut, assy FOHE support - Front 79-21-11, 01-330 FK11165 Bracket, assy front upper mounting - Oil tank 79-21-11, 01-400 FK19924 Plate, assy FCOC support 79-21-11, 01-500 FK19264 Strut, assy FCOC support - Lower 79-21-11, 01-620 FK11164 Bracket, assy FCOC mounting - Lower 72-34-15, 05-085 FK31365 Bracket, top mounting assy FCOC Mounting - Upper 72-34-15, 05-230 FK31375 Bracket, bottom mount, assy FCOC brace mounting (b) FOHE mounting hardware acceptance and rejection criteria: Bearings tight but not seized Accept Low friction but no play in bearings Accept Minor scratches/score marks Accept Play in spherical bearings Reject Spherical bearings seized Reject**Printed in Great Britain**



# RB.211−73−AG948 Page 19 Sep.28/12 Sep.28/12Bent or twisted Reject (3) Re-assemble the FOHE mounts and links in accordance with Engine Manual 72-00-34 and 72-34-00. (4) For each fuel tube, make sure there is a 5 mm minimum clearance from any adjacent tubes and hardware. If necessary loosen adjacent clips and carefully manipulate the tube alignment to achieve the necessary clearance. C. A record of accomplishment is required.**Printed in Great Britain**



# RB.211−73−AG948 Page 20 Sep.28/12 Sep.28/12SB73-F737 and SB73-F738 Fuel Tubes and LP Compressor Case Fig.1**Printed in Great Britain**



# RB.211−73−AG948 Page 21 Sep.28/12 Sep.28/12Pre SB73-F738 LP Fuel Pump to FOHE Supply Tube Run Fig.2**Printed in Great Britain**



# RB.211−73−AG948 Page 22 Sep.28/12 Sep.28/12SB73-F738 LP Fuel Pump to FOHE Supply Tube Run Fig.3**Printed in Great Britain**



# RB.211−73−AG948 Page 23 Sep.28/12 Sep.28/12Pre SB73-F737 and SB73-F737 Fuel Tubes LP Compressor Case Fig.4**Printed in Great Britain**



# RB.211−73−AG948 Page 24 Sep.28/12 Sep.28/12Pre SB73-F737 and SB73-F737 FOHE to HP Fuel Pump Tube Run Fig.5 (sheet 1 of 2)**Printed in Great Britain**



# RB.211−73−AG948 Page 25 Sep.28/12 Sep.28/12Pre SB73-F737 and SB73-F737 FOHE to HP Fuel Pump Tube Run Fig.5 (sheet 2 of 2)**Printed in Great Britain**



# RB.211−73−AG948 Page 26 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assembly CP102252 Fig.6**Printed in Great Britain**



# RB.211−73−AG948 Page 27 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assembly CP100178 Fig.7**Printed in Great Britain**



# RB.211−73−AG948 Page 28 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assembly CP100180 Fig.8**Printed in Great Britain**



# RB.211−73−AG948 Page 29 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assembly CP102259 Fig.9**Printed in Great Britain**



# RB.211−73−AG948 Page 30 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assemblies CP102373 and 100186 Fig.10**Printed in Great Britain**



# RB.211−73−AG948 Page 31 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assembly CP102260 Fig.11**Printed in Great Britain**



# RB.211−73−AG948 Page 32 Sep.28/12 Sep.28/12Pre SB73-F737 and SB73-F737 Clipstack Assembly CP100181 Fig.12**Printed in Great Britain**



# RB.211−73−AG948 Page 33 Sep.28/12 Sep.28/12Pre SB73-F737 and SB73-F737 Clipstack Assembly CP102321 Fig.13 (sheet 1 of 2)**Printed in Great Britain**



# RB.211−73−AG948 Page 34 Sep.28/12 Sep.28/12Pre SB73-F738 and SB73-F738 Clipstack Assembly CP102321 Fig.13 (sheet 2 of 2)**Printed in Great Britain**



# RB.211−73−AG948 Page 35 Sep.28/12 Sep.28/12Pre SB73-F737 and SB73-F737 Clipstack Assembly CP100282 Fig.14**Printed in Great Britain**



# RB.211−73−AG948 Page 36 Sep.28/12 Sep.28/12SB73-F737 Clipstack Assembly CP102374 Fig.15**Printed in Great Britain**



# RB.211−73−AG948 Page 37 Sep.28/12 Sep.28/12Pre SB73-F737 Clipstack Assembly CP100187 Fig.16**Printed in Great Britain**



# RB.211−73−AG948 Page 38 Sep.28/12 Sep.28/12FOHE Mounting Hardware Fig.17**Printed in Great Britain**



# RB.211−73−AG948 Page 39 Sep.28/12 Sep.28/12FOHE Mounting Hardware Fig.18**Printed in Great Britain**



# RB.211−73−AG948 Page 40 Sep.28/12 Sep.28/12Arrangement of bonding leads Fig.19**Printed in Great Britain**



# RB.211−73−AG948 Page 41 Sep.28/12 Sep.28/12Arrangement of Brackets Mounted on Fancase Flange FD Fig.20**Printed in Great Britain**



# RB.211−73−AG948 Page 42 Sep.28/12 Sep.28/12Arrangement of Brackets Mounted on Fancase Flange FE Fig.21**Printed in Great Britain**



# RB.211−73−AG948 Page 43 Sep.28/12 Sep.28/12This form (or similar) to be completed for every inspection where rectification action was required. Results to be sent to Rolls-Royce via your Service Representative

Feedback Sheet NMSB 73-AG948 Date: Operator: Engine Serial Number: Aircraft: Hours Cycles Engine Life: Life since last shop visit: Life since embodiment of NMSB 73-G723/NMSB 73-AG797*: Fuel Tubes Condition Observations (material transfer from clips/fretted/dented/worn-please specify) 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 - please specify) 102252 100178 100180 102259 102321 102373 (SB 73-F738)/ 100186 (pre SB 73-F738)* 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/bent or twisted/minor cosmetic damage - please specify) FK10141 FK19290 FK11165 FK19924 FK19264 FK11164 FK31365 FK31375 NOTES: * delete as appropriate APPENDIX 1**Printed in Great Britain**



# RB.211−73−AG948 Appendix 1 - Page 1 of 1 Sep.28/12 Sep.28/12