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

Bulletin 1 Feb.27/12 2 Feb.27/12 3 Feb.27/12 4 Feb.27/12 5 Feb.27/12 6 Feb.27/12 7 Feb.27/12 8 Feb.27/12 9 Feb.27/12 10 Feb.27/12 11 Feb.27/12 12 Feb.27/12 13 Feb.27/12 14 Feb.27/12 15 Feb.27/12 16 Feb.27/12 17 Feb.27/12 18 Feb.27/12 19 Feb.27/12 20 Feb.27/12 21 Feb.27/12 22 Feb.27/12 23 Feb.27/12 24 Feb.27/12 25 Feb.27/12 Appendix 1 1 Feb.27/12 2 Feb.27/12 3 Feb.27/12 4 Feb.27/12 5 Feb.27/12 Appendix 2 1 Feb.27/12 2 Feb.27/12 3 Feb.27/12**Printed in Great Britain**



# RB.211−72−AG873 Transmittal - Page 21. Planning Information A. Effectivity Airbus A330 RB211 Trent 768 Engines Post SB 72-F117 and pre SB72-F227 HP/IP Structure part number FW47425 RB211 Trent 772 Engines Post SB 72-F117 and pre SB72-F227 HP/IP Structure part number FW47425 RB211 Trent 772B Engines Post SB 72-F117 and pre SB72-F227 HP/IP Structure part number FW47425 RB211 Trent 772C Engines Post SB 72-F117 and pre SB72-F227 HP/IP Structure part number FW47425 Engine Serial Nos. 41221, 41425, 41428, 41430, 41431, 41432, 41435, 41437, 41438, 41440, 41442, 41445, 41446, 41451, 41452, 41454, 41455, 41456, 41459, 41460, 41461, 41462, 41463, 41464, 41465, 41466, 41468, 41469, 41470 and 41471.
B. Reason One Trent 700 engine removal event occurred in August 2011, caused by high oil consumption. Overhaul shop investigation found a small hole in the oil feed tube of the HP/IP Bearing Support structure caused by outer heat shield frettage. The build records and physical part identification marking indicated that the HP/IP structure fitted to this engine was FW47425 (Post 72-F117) standard and should have not have had the outer heat shield fitted on the oil feed tube. Manufacturing investigation as to why this structure had a Pre SB 72-F117 standard outer heat shield fitted has proven inconclusive. Therefore, further post SB 72-F117 standard structures could be in service with pre-SB72-F117 outer heat shields fitted to the oil feed tube. NMSB 72-AF045 requires the inspection of all pre SB 72-F117 standard oil feed heat shields for cracking and tube frettage Frettage damage may occur on the oil feed tube within the HP/IP turbine bearings support which can result in oil leakage into the IP nozzle guide vane and areas adjacent to the HP/IP support structure. The frettage is attributed to contact with the tubes outermost heat shield, which may crack under thermal distress around one of the attaching clips and become detached and free to move on the oil tube, resulting in frettage damage to the tube wall. ENGINE - INSPECTION OF POST SB72-F117 HP/IP TURBINE OIL FEED TUBE FOR INCORRECT OUTER HEAT SHIELD FITMENT AND DAMAGE - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.72-AG873**Printed in Great Britain**



# RB.211−72−AG873 Page 1 of 25 Feb.27/12 Feb.27/12Service Bulletin 72-F117 introduced a revised HP/IP turbine bearing support structure FW47425, similar to the existing item but incorporating changes to eliminate the possibility of frettage damage occurring between the outer section of the oil feed tube and associated outer insulation heatshield by deleting the outer insulating heat shield on the oil feed tube, together with the two retaining clips and rivets. C. Description This NMSB instructs an initial inspection of the oil feed pipe to confirm if the outer heat shield is incorrectly fitted and repeat inspection of the oil feed tube outer heat shield if required. The purpose of the inspection is to identify incorrectly fitted heat shields, instruct inspection of these heat shields for any damage which might lead to fretting of the oil tube, and also to identify any tube damage which might already be present. The inspection can be carried out on engines on-wing, or on fully built engines off-wing, and also on 05 Modules in the overhaul shop, at any level of rework. During overhaul of the 05 module, any incorrectly fitted oil tube heat shields should be removed, the feed tubes require inspected and repaired if found damaged. Therefore the threshold life for this inspection is based on life since new or since overhaul of the 05 module. The repeat inspection interval will be dependent on heat shield condition at the previous inspection. IOR Service Bulletin 72-G874 permits the continued operation of the engine with a Pre SB72-F117 (FW34763) oil feed tube heat shield, fitted to a Post SB 72-F117 (FW47425) HP/IP bearing structure. NMSB 72-AG873 instructs the on-wing inspection of the HP/IP turbine oil feed tube outer heat shields for cracking. Record all inspection, on findings Table 1 (on-wing), Table 2 (in-shop) and return to Rolls-Royce via your local Rolls-Royce Field Service Office. D. Compliance
ALERT The actions described in section 3. Accomplishment Instructions of this Non-Modification Service Bulletin (NMSB) should be accomplished as below: Inspect all engines listed in section 1.A. Effectivity at the next convenient maintenance opportunity, and within 4 months of initial issue of this NMSB. Rolls-Royce understand that this NMSB will be the subject of a European Aviation Safety Agency (EASA) approved Airworthiness Directive (AD).**Printed in Great Britain**



# RB.211−72−AG873 Page 2 Feb.27/12 Feb.27/12(1) Inspection On-Wing Carry out the action specified in 3. Accomplishment Instructions, Part A, as follows: (a) For 05 modules which have not been previously inspected in accordance with this NMSB, carry out the action at an 05 module threshold life of 10,000 hours or 2,500 cycles (whichever occurs first) since new or since 05 module overhaul: (i) For 05 modules that exceed the threshold life at the time of issue of this NMSB, carry out the action within 4 months of issue of the NMSB. (ii) For 05 modules that are below the threshold life at the time of issue of the NMSB, carry out the action within 3 months of reaching the threshold life. (b) Determine the serviceability and the interval to next inspection as follows (for flowchart, refer to Appendix 2): (i) If there is no oil feed tube outer heat shield fitted to the HP/IPT support assembly, then accept the engine, no further inspection required. (ii) HP/IPT support assemblies with no visible damage to the feed tube outer heat shield must be re-inspected at an interval not greater than 10,000 hours or 2500 cycles, which ever occurs first. (iii) HP/IPT support assemblies with partial cracking up to 90 degrees around the circumference or 10 mm along the length of the feed tube outer heat shield must be re-inspected at an interval not greater than 6,400 hours or 1600 cycles, which ever occurs first. (iv) HP/IPT support assemblies with cracking in excess of that in step (b)(iii) but less than 360 degrees around the circumference of the feed tube outer heat shield must be re-inspected at an interval not greater than 1,600 hours or 400 cycles whichever occurs first. (v) HP/IPT support assemblies with no feed tube outer heat shield material remaining that can cause further frettage are acceptable for continued operation with no further inspection to this NMSB, subject to any existing frettage being less than 0,46 mm (0.018 in.) depth.**Printed in Great Britain**



# RB.211−72−AG873 Page 3 Feb.27/12 Feb.27/12(vi) HP/IPT support assemblies with cracking around the complete circumference of the feed tube outer heat shield, or with missing material from the feed tube outer heat shield, where insulation blanket material has prevented frettage between the heat shield and tube, must be re-inspected at an interval not greater than 1,600 hours or 400 cycles whichever occurs first. (vii) HP/IPT support assemblies with cracking around the complete circumference of the feed tube outer heat shield, or with missing material from the feed tube outer heat shield, where it is possible to assess the depth of existing frettage around the full 360 degrees and it is acceptable to step (b)(ix) , must be re-inspected at an interval not greater than 400 hours or 100 cycles whichever occurs first. (viii) HP/IPT support assemblies with cracking around the complete circumference of the feed tube outer heat shield, or with missing material from the feed tube outer heat shield, must be rejected from service within 50 cycles of the inspection being carried out, if the depth of frettage can not be assessed, and if the alleviation described in step (b)(vi) is not applicable. (ix) HP/IPT support assemblies with surface frettage depth greater than 0,46 mm (0.018 in.) on the feed tube at the outer heat shield position must be rejected from service within 10 cycles of the inspection being carried out.
NOTE : All areas of the tube adjacent to a 360 degree circumferential crack or areas of missing heat shield material must be inspected for frettage. (c) For 05 modules which have been previously inspected in accordance with this NMSB: (i) Carry out the action at the interval determined in steps 1.D.(1)(b) or 1.D.(2)(b), whichever was the most recent previous inspection. (ii) Determine the serviceability and the interval to next inspection as detailed in step 1.D.(1)(b). (2) Inspection In-Shop Carry out the action specified in 3. Accomplishment Instructions, Part B, as follows: (a) At every shop visit.**Printed in Great Britain**



# RB.211−72−AG873 Page 4 Feb.27/12 Feb.27/12(b) Following inspection in-shop, determine the serviceability and the repeat inspection interval of the HP/IP turbine support assembly as follows: (i) If there is no oil feed tube outer heat shield fitted to the HP/IPT support assembly, then accept the engine, no further inspection required. (ii) If there is no damage to the feed tube outer heat shield, then remove the heat shield as per SB 72-F117 and accept the engine, no further inspection required. (iii) If there is any missing material and/or cracked of the heat shield, then remove the heat shield as per SB 72-F117 and inspect the oil feed tube for fretting. If oil feed tubes has no damage, then accept the engine/module with no further inspection required to this NMSB. (iv) If the feed tube has any frettage damage, reject the module and carry out inspection in accordance with Engine Manual Task 72-51-24-200-801, Examine the HP/IP Turbine Bearing Support Assembly.
NOTE : If In-shop, then the NMSB inspection must be carried out regardless of module life since new or overhaul, and regardless of life since previous inspection to this NMSB.
NOTE : For the purposes of this NMSB, the term '05 module overhaul' refers to an 05 module shop visit where the HP/IP turbine internal oil tubes have been exposed and the tube heat shields subjected to a detailed visual inspection in accordance with Engine Manual Task 72-51-24-200-801, Examine the HP/IP Turbine Bearing Support Assembly. E. Approval The technical content of this Non-Modification Service Bulletin was approved under the authority of Design Organisation Approval EASA.21J.035 on Feb.24/12. F. Manpower (1) On-Wing
NOTE : This does not include time to gain access to the core engine, or carry out ground running. (a) Time to remove core engine dressings to gain access to the internal oil tube: 1 hour elapsed time**Printed in Great Britain**



# RB.211−72−AG873 Page 5 Feb.27/12 Feb.27/12(b) Time to carry out inspection: 0.5 hours elapsed time (c) Time to restore to serviceable condition: 0.5 hours elapsed time (d) Number of people required for inspection: 2 persons (e) Ground running requirement: Fuel and oil leak test (f) No special training required (2) In-Shop
NOTE : Assumes that the inspection is carried out after removal of the 05 module, with the module in the build stand. (a) Time to carry out inspection: 0.5 man hours (b) Number of people required for inspection: 1 person (c) Standard pass-off testing is sufficient for leak test (d) No special training required G. Material Requirements A replacement external oil tube is required if the original tube is cut off in accordance with Appendix 1. (1) External Oil Feed Tube, EIPC 79-22-49, 02-100, P/N FW14193 H. Tooling Requirements (1) Flexible borescope 6 mm diameter with straight ahead viewing tip and sideways viewing tip. (2) Stainless steel rod diameter 8 mm, 250 mm minimum length, local supply. Remove all sharp edges, and radius both ends 1 mm minimum radius. (To fit inside feed tube)**Printed in Great Britain**



# RB.211−72−AG873 Page 6 Feb.27/12 Feb.27/12(3) 2 m length of lightweight nylon rope, local supply. (4) Tooling/Consumables required for Oil Tube Union Cutting Procedure (Appendix 1): (a) HU40179-1 (b) Portable electric drill 230 RPM (c) Pipe Cutting Tool or Tube Cropping Tool (swarf-free cutting process) (d) Vacuum cleaner - with 8 mm diameter suction hose (e) Engine oil I. References (1) Rolls-Royce RB211 Service Bulletins: (a) 79-D102 Oil - Oil System Tubes and Fittings - Core Engine - Introduction of revised HP/IP Turbine Structure Oil Tubes (b) 72-E708 Engine - HP/IP Bearing Support - Introduction of a revised HP/IP Turbine Bearings Support Structure with Re-positioned HP3 Cooling Air Holes and Deleted Oil Service Tube Heatshields (c) 72-F117 Engine - HP/IP Bearing Support - Introduction of a revised HP/IP Turbine Bearings Support Structure with Deleted Oil Feed Tube Outer Heatshield (d) 72-F227 Engine - HP/IP Bearing Support - Introduction of an HP/IP Turbine Bearings Support Structure with revised Oil and Air Service Tubes and Associated Insulated Heatshield Covers (2) Rolls-Royce RB211 Non-Modification Service Bulletin: (a) 72-AF045 Engine - Inspection of the HP/IP Turbine Oil Feed Tube Outer Heat Shield for Damage - Non-Modification Service Bulletin**Printed in Great Britain**



# RB.211−72−AG873 Page 7 Feb.27/12 Feb.27/12(3) IOR Service Bulletins: (a) 72-F048 Engine - HP/IP Turbine Bearing Support On-wing - Removal of Oil Feed Tube Outer Heat Shield (b) 72-G874 TRENT 700 - HP/IP Turbine Bearing Support - Continued Operation of the Engine with a Pre SB 72-F117 Oil Feed Tube Heat Shield Installed on a FW47425 (Post SB 72-F117) (4) Engine Overhaul Information Notice Number 37, HP/IP Turbine Support Assembly - Overhaul inspection requirements for oil and air service tubes (5) Engine Manual Task 72-51-24-200-801, Examine the HP/IP Turbine Bearing Support Assembly (6) Engine Manual Task 72-51-24-300-032, HP/IP Turbine Bearing Support Assembly - Repair damaged oil tubes and end adaptors by orbital welding (7) Aircraft Maintenance Manual 71-00-00-700-827, Test 2 The Fuel and Oil Leak Test**Printed in Great Britain**



# RB.211−72−AG873 Page 8 Feb.27/12 Feb.27/122. Material Information
A. None**Printed in Great Britain**



# RB.211−72−AG873 Page 9 Feb.27/12 Feb.27/123. Accomplishment Instructions A. On-wing

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, WERE POSSIBLE, TO PROMOTE THIS RECOMMENDATION. (1) Inspection of the HP/IPT Outer Heat Shield on the Oil Feed Tube
CAUTION : FOR ENGINES PRE SB 79-D102, DO NOT EXCEED A TORQUE OF 1000 LBF.IN AND FOR ENGINES POST SB 79-D102, DO NOT EXCEED A TORQUE OF 1500 LBF.IN. WHEN DISCONNECTING THE UNION NUT, OTHERWISE THE INTERNAL OIL VENT TUBE MAY BECOME DAMAGED.
NOTE : If the post-SB 79-D102 standard union cannot be disconnected, carry out the tube union nut cutting procedure in Appendix 1 to remove the union nut. (a) Disconnect the external HP/IPT oil feed tube, EIPC 79-22-49, 02-100, from the union with the 05 Module. See Fig.1. (b) Loosen the external feed tube clips and in-line connector, to allow the tube to be moved away from the internal feed tube. (c) Remove the anti-rotation sleeve from the IP turbine casing, EIPC 72-51-23, 01-220. (i) Remove the two bolts EIPC 72-51-23, 01-222. (ii) Use a drift if necessary, to remove the sleeve from the casing.
CAUTION : CONFIRM THAT THE ROD IS RADIUSED 1MM MINIMUM AND FREE OF SHARP EDGES, TO AVOID DAMAGE TO THE INTERNAL SURFACES OF THE FEED TUBE (d) Carefully insert the stainless steel rod into the internal feed tube until it makes light contact with the first bend. Pull the rod upwards to deflect the tube, until the tube end fitting contacts the IPT casing. This will allow sufficient clearance between the tube end fitting and IPT casing for borescope access. See Fig 3. (e) Use the lightweight rope to secure the rod and hold the tube in this position, by attaching the rope to suitable bolts on the 04/05 module flanged joint.**Printed in Great Britain**



# RB.211−72−AG873 Page 10 Feb.27/12 Feb.27/12CAUTION : YOU MUST NOT CARRY OUT THE HEAT SHIELD INSPECTION WHILE THE ENGINE IS STILL HOT, BECAUSE THIS MIGHT CAUSE DAMAGE TO THE BORESCOPE. IF IN DOUBT, REMOVE THE BORESCOPE AFTER A SHORT PERIOD OF TIME AND CHECK FOR OVERHEATING (f) Carry out a borescope inspection of the lower half of the outer heat shield on the HP/IPT internal oil feed tube. (g) Remove the flexible borescope. (h) Release the rope securing the rod. Use the rod to move the internal feed tube downwards until the tube end fitting contacts the IPT casing. Secure the rod in this position using the lightweight rope. (i) Carry out a borescope inspection of the upper half of the outer heat shield. (j) Remove the flexible borescope. (k) Release the rope securing the rod.
NOTE : Table 1 suggests different categories of damage to the heat shield. (l) Record the condition of the outer heat shield in Table 1. Refer to Figs 4 to 7, for examples of different heat shield conditions. (m) Install the anti rotation sleeve, EIPC 72-51-23, 01-220.
NOTE : It might be necessary to use the stainless steel rod to centralise the feed tube relative to the hole in the IPT casing before installation of the anti-rotation sleeve. (i) Align the sleeve with the internal oil feed tube and install the sealing sleeve to the IP turbine case. (ii) Attach the sleeve with the two bolts, and torque tighten bolts to 4,5 Nm (40 lbf.in.) (n) Install the external feed tube, EIPC 79-22-49, 02-100, to the oil tube and IP turbine case. (i) Assemble the clip positions 4366, 4405, 4396, 4397 and 4398, see Fig.2. (ii) Torque the tube connector to oil tube, to 33 Nm (295 lbf.in.) and the tube connector to the IP turbine case, to 27 Nm (240 lbf.in.). Safety with OMat 2/142 safety cable. (iii) Torque the clip bolts to 6,2 Nm (55 lbf.in.).**Printed in Great Britain**



# RB.211−72−AG873 Page 11 Feb.27/12 Feb.27/12(2) Acceptance Limits (a) Accomplishment of this Non-Modification Service Bulletin should be recorded in accordance with local SB tracking system procedures. (b) If the oil feed tube outer heat shield are not present, then accept the engine, no further inspection required. (c) If there is no damage to the oil feed tube outer heat shield, then accept the engine, subject to re-inspection at the interval specified in step 1.D.(1)(b)(ii). (d) If there is partial cracking of the feed tube outer heat shield up to an angle of 90 degrees of the circumference or less than 10 mm along the length of the heat shield, then accept the engine, subject to re-inspection at the interval specified in step 1.D.(1)(b)(iii). (e) If there is cracking greater than in step (2)(d) but less than 360 degrees around the circumference of the feed tube outer heat shield, then accept the engine, subject to re-inspection at the interval specified in step 1.D.(1)(b)(iv). (f) If the feed tube outer heat shield is cracked around the complete circumference, or there is any missing material from the heat shield or the heat shield has fretted against the tube, refer to the acceptance criteria in steps 1.D.(1)(b)(v) to (ix) to determine the interval to next inspection or engine removal. (3) Leak Test (a) Carry out Test Number 2, The Fuel and Oil Leak Test in accordance with AMM Task 71-00-00-700-827, Test 2. B. In-Shop (1) For 05 Modules not undergoing strip and overhaul: (a) Carry out inspection of the HP/IPT internal oil feed tube outer heat shield in accordance with Section 3.A.(1). (b) If the oil feed tube outer heat shield are not present, then accept the engine, no further inspection required. (c) If there is no damage to the feed tube outer heat shield, then remove the heat shield as per SB 72-F117 and accept the engine, no further inspection required. (d) If there is any missing material and/or cracked of the heat shield, then remove the heat shield as per SB 72-F117 and inspect the oil feed tube for fretting. If oil feed tubes has no damage, then accept the engine/module with no further inspection required to this NMSB.**Printed in Great Britain**



# RB.211−72−AG873 Page 12 Feb.27/12 Feb.27/12(e) If the feed tube outer heat shield is cracked, or there is any missing material from the heat shield, but oil feed tube has not fretted damage, then remove the heat shield from the oil feed tube, then accept the engine/module, with no further inspection to this NMSB. (f) If the feed tube has any frettage damage, reject the module and carry out inspection in accordance with Engine Manual Task 72-51-24-200-801.
NOTE : Table 2 is a copy of the report sheet from Engine Overhaul Notice Number 37, which is also used to record the condition of other aspects of the HP/IP turbine support oil and air tube, eg; vent tube carbon and inner heat shield condition. (g) Accomplishment of this Non-Modification Service Bulletin should be recorded in the engine logbook. (2) For 05 Modules undergoing strip and overhaul:
NOTE : During 05 Module overhaul, the oil tube outer heat shields are exposed, hence the borescope procedure described in section 3.A. of this NMSB is not necessary. (a) Carry out inspection of the HP/IPT internal oil vent and scavenge tube outer heat shields in accordance with Engine Overhaul Notice Number 37 and Engine Manual Task 72-51-24-200-801. (b) Report all findings to Rolls-Royce on Table 2.**Printed in Great Britain**



# RB.211−72−AG873 Page 13 Feb.27/12 Feb.27/12Oil Feed Tube Fig.1**Printed in Great Britain**



# RB.211−72−AG873 Page 14 Feb.27/12 Feb.27/12Clip Position 4145 Fig.2 (sheet 1 of 6)**Printed in Great Britain**



# RB.211−72−AG873 Page 15 Feb.27/12 Feb.27/12Clip Position 4396 Fig.2 (sheet 2 of 6)**Printed in Great Britain**



# RB.211−72−AG873 Page 16 Feb.27/12 Feb.27/12Clip Position 4397 Fig.2 (sheet 3 of 6)**Printed in Great Britain**



# RB.211−72−AG873 Page 17 Feb.27/12 Feb.27/12Clip Position 4398 Fig.2 (sheet 4 of 6)**Printed in Great Britain**



# RB.211−72−AG873 Page 18 Feb.27/12 Feb.27/12Clip Position 4851 Fig.2 (sheet 5 of 6)**Printed in Great Britain**



# RB.211−72−AG873 Page 19 Feb.27/12 Feb.27/12Clip Position 4405 Fig.2 (sheet 6 of 6)**Printed in Great Britain**



# RB.211−72−AG873 Page 20 Feb.27/12 Feb.27/12To Show use of Stainless Steel Rod and Lightweight Rope to Displace Oil Feed Tube for Borescope Access Fig.3**Printed in Great Britain**



# RB.211−72−AG873 Page 21 Feb.27/12 Feb.27/12Undamaged Heat Shield Fig.4**Printed in Great Britain**



# RB.211−72−AG873 Page 22 Feb.27/12 Feb.27/12Heat Shield Cracked up to 90 degrees Fig.5**Printed in Great Britain**



# RB.211−72−AG873 Page 23 Feb.27/12 Feb.27/12Heat Shield Cracked more than 90 degrees but less than 360 degrees Fig.6**Printed in Great Britain**



# RB.211−72−AG873 Page 24 Feb.27/12 Feb.27/12Heat Shield Cracked 360 degrees Fig.7**Printed in Great Britain**



# RB.211−72−AG873 Page 25 Feb.27/12 Feb.27/12Procedure for Cutting off a Seized Feed Tube Union Nut 1. Effectivity This procedure is applicable to the HP/IP turbine oil feed tube SB 79-D102 standard.
NOTE : This procedure is not applicable to pre SB 79-D102 standard oil tubes. Based on service experience, pre SB 79-D102 standard union nuts are not susceptible to seizure. 2. Description of Procedure The procedure cuts through the thrust shoulder of the union nut. This removes the axial load from the union nut threads, which reduces the torque required to unscrew the nut. The union nut and external tube are destroyed in the procedure. The depth stop on the cutting tool prevents the cutting tool from making contact with the internal oil tube end fitting, so the internal oil tube is not damaged by this procedure. 3. Tools and Consumables A. HU40179-1 - Hole cutting tool B. Portable electric drill - 230 RPM C. Pipe cutting tool or tube cropping tool (swarf-free cutting process) D. Vacuum cleaner - with 8 mm diameter suction hose E. Engine oil 4. Material Requirements A. A replacement external oil tube is required if the original tube is cut off. (1)External oil feed tube, EIPC 79-22-49, 02-100, P/N FW14193 5. Procedure A. Disconnect the external oil tube in-line connector, and all tube clips, refer to steps 3.A.(1)(b) or 3.A.(2)(b). B. Cut the external tube a maximum length of 30 mm (1.18 in.) from the union nut, see Fig.8. Use a manual pipe cutting tool or cropping tool to avoid making any cutting debris. C. If the tube is open ended, close the end of the cut tube using a temporary bung, to prevent ingress of contamination. APPENDIX 1**Printed in Great Britain**



# RB.211−72−AG873 Appendix 1 - Page 1 of 5 Feb.27/12 Feb.27/12D. Lubricate the shoulder of the union nut with clean engine oil.
CAUTION : WHEN THE CUTTING TOOL BREAKS THROUGH THE UNION NUT SHOULDER, THE NUT CAN TURN WITH THE CUTTING TOOL. WHEN THIS HAPPENS, STOP CUTTING IMMEDIATELY, BECAUSE IF THE NUT IS ROTATED THROUGH SEVERAL TURNS, THE CUTTING TOOL CAN MAKE CONTACT WITH THE INTERNAL OIL TUBE END FITTING E. Cut through the shoulder of the union nut, using the hole cutting tool HU40179-1 and the electric drill. F. Remove all swarf, using the vacuum cleaner. G. Remove the union nut. Do not allow any debris to drop into the open end of the internal oil tube.**Printed in Great Britain**



# RB.211−72−AG873 Appendix 1 - Page 2 Feb.27/12 Feb.27/12Union Nut Cutting Tool shown in situ on the HP/IP Feed Tube Fig.8**Printed in Great Britain**



# RB.211−72−AG873 Appendix 1 - Page 3 Feb.27/12 Feb.27/12On-Wing Inspection Findings Engine Serial Number: 05 Module Serial Number: Engine Operator: Inspection Date:

Overhaul Base: Maintenance Agent:

05 Module Life Since New: Hours: 05 Module Life Since Overhaul: Hours: Cycles: Cycles:

Feed Tube Outer Heat Shield Heat Shield Fitted: Yes / No Heat Shield Condition* Type of damage and location Is the damage axial or radial? What is the approximate length of cracking? Is any material missing? The following categories are suggested to quantify level of damage to the heat shields: #1 - No damage #2 - Limited damage (cracking up to 10 mm in length or 90 degrees around circumference) #3 - Moderate damage (cracking greater than #2 but less than 360 degrees around circumference) #4 - Heavy damage (cracking around the complete 360 degrees/missing material/tube is fretted) Table 1**Printed in Great Britain**



# RB.211−72−AG873 Appendix 1 - Page 4 Feb.27/12 Feb.27/12In-Shop Inspection Findings Engine Mark / Engine Serial Number: Module 51 Serial Number: Operator: Overhaul Base and Induction Date: Module Life Since New: Hours: Module Life Since M05 Overhaul: Hours: Cycles: Cycles: Condition Vent Tube Feed Tube Scavenge Tube Buffer Air Tubes Inner Heat Shield Condition (pre-cleaning) Outer Heat Shield Fitted (Yes / No) Post SB72-E708 Yes / No Post SB72-F117 Yes / No Post SB72-E708 Yes / No Not Required

Outer Heat Shield Condition (pre-cleaning)

Borescope Inspection Results - Carbon Thickness (pre-cleaning) Not Required

Maximum galling depth - inner tube

Maximum galling depth - outer tube

Borescope Inspection Results - Carbon Thickness (after cleaning) Not Required

Repair action required, eg: replace heat shield / tube

Table 2**Printed in Great Britain**



# RB.211−72−AG873 Appendix 1 - Page 5 Feb.27/12 Feb.27/12On-wing Inspection Flowchart APPENDIX 2**Printed in Great Britain**



# RB.211−72−AG873 Appendix 2 - Page 1 of 3 Feb.27/12 Feb.27/12**Printed in Great Britain**



# RB.211−72−AG873 Appendix 2 - Page 2 Feb.27/12 Feb.27/12**Printed in Great Britain**



# RB.211−72−AG873 Appendix 2 - Page 3 Feb.27/12 Feb.27/12