LIST OF EFFECTIVE PAGES The effective pages to this Service Bulletin following incorporation of Revision 3 are as follows: Page Revision Number Revision Date

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



# RB.211−72−AF964 Transmittal - Page 21. Planning Information A. Effectivity (1) RB211-TRENT 500 Engines - All HP Compressor Stage 1 to 4 Rotor Discs: FK30524 FW88340 R (2) RB211-TRENT 700 Engines - All HP Compressor Rotor Shafts: FK22745 FK26185 R FW20197 R FW88696 R FW88700 FK23313 FK32129 R FW20638 R FW88697 R FW88701 FK24031 R FW20195 R FW23711 R FW88698 R FW88702 FK25502 R FW20196 R FW88695 R FW88699 R FW88703 (3) RB211-TRENT 800 Engines - All HP Compressor Stage 1 to 4 Rotor Discs: FK24009 FK32580 R FW61622 R FW88724 R FK26167 R FW11590 R FW88723 R FW88725 R (4) RB211-524G-T, 524H-T Engines - All HP Compressor Rotor Shafts: FK25502 FW20195 FW23711 FW88695 R FW88696 FW88697
B. Reason During manufacture of a small number of HP Compressor Stage 1 and 2 discs with axial dovetail slots, anomalies at the disc post corners have been found. Whilst no anomalies have been found on in-service discs, this Non-Modification Service Bulletin (NMSB) has been raised to reduce the potential risk of a crack propagating from an anomaly. An investigation of the root cause of the anomalies is in progress. As a result, an inspection at the HP Compressor Stage 1 and 2 axial dovetail slots is required. This NMSB instructs a local Fluorescent Penetrant Inspection (FPI) of the HP Compressor Stage 1 and 2 discs axial dovetail slots, see Section 3. Accomplishment Instructions for engine applicability. Revision 1 of this NMSB was issued to correct a part number in 1.A.Effectivity, to advise that the actions instructed would be contained within an EASA AD and to revise Accomplishment Instructions to include Overhaul Process 104 references and changes to FPI parameters. Revision 2 of this NMSB was R issued to identify the applicable Airworthiness Directive and to delete reference to NMSB 72-AF259 which was R superseded by NMSB 72-AG330 and is managed separately. R Figure 4 was amended to show the front face of the axial dovetail slot. ENGINE - HP COMPRESSOR DRUM - INSPECTION OF AXIAL DOVETAIL SLOTS - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.72-AF964**Printed in Great Britain**



# RB.211−72−AF964 Page 1 of 11 Jun 3/08 Jan.11/13 RRevision 3 of this NMSB introduces three changes: R (1) 1.A., Effectivity is extended to include the part numbers introduced by Service Bulletins 72-G612, 72-G613 and 72-G614 (see 1.H., References). R R (2) The requirement to complete the Record of Accomplishment sheet and return it to Rolls-Royce is removed because sufficient data has now been supplied. R R R (3) When the FAA amends an Airworthiness Directive (AD), the new version is given a different number. The previous version of this NMSB identified ADs by number, which made it necessary to revise the NMSB when AD numbers changed. This then made it necessary for operators to change their compliance documentation. R R R R R Revision 3 of this NMSB removes the AD numbers from section 1.C.,Compliance; this will make sure that subsequent changes to the Airworthiness Directives will not make it necessary to revise this NMSB. R R R C. Compliance
ALERT Rolls-Royce recommends that the following action is undertaken to maintain reliability. The actions detailed in Section 3. Accomplishment Instructions must be completed on all HP Compressor drums regardless of disposition, in accordance with the following. For all hardware covered in Section 1.A., R Effectivity: (1) At every engine Refurbishment (Level 3) shop visit, Overhaul (Level 4) shop visit or when the HP compressor rotor is at piece part level, and the life of the drum is greater than 1000 cycles since new, then complete the action defined in Section 3., R Accomplishment Instructions. (2) For hardware currently at Refurbishment (Level 3) shop visit, Overhaul (Level 4) visit or when the HP compressor is at piece part level on the date of issue of this NMSB, if the HP compressor rotor assembly is not completed and the life of the drum is greater than 1000 cycles since new, then complete the action defined in Section 3., R Accomplishment Instructions. This NMSB does not instruct inspection on Time Expired HP Compressor drums. The actions instructed in this NMSB are mandated by R EASA and FAA Airworthiness Directives. R**Printed in Great Britain**



# RB.211−72−AF964 Page 2 Jun 3/08 Jan.11/13 RD. Approval The technical content of this Non-Modification Service Bulletin was approved under the authority of Design Organisation Approval EASA.21J.035 on June 2/08 and was re-approved on June 7/11 and Dec.12/12. R E. Manpower In Service: Not applicable At Overhaul: 20 man hours F. Material Price and Availability Not applicable G. Tooling Price and Availability Not applicable R H. References (1) Rolls-Royce RB211 R Service Bulletins: (a) RB211-524G-T, 524H-T, RB211-TRENT 500, TRENT 700, TRENT 800 Engines R 72-AG330 R Engine - HP Compressor Stage 1 Drum Inspection - Non-Modification Service Bulletin R R (b) Trent 500 and 700 Engines R 72-G612 R Engine - HP Compressor Shaft - Introduction of a reworked HP Compressor Shaft assembly with revised interference bush with improved lead-in chamfer - Mod.72-G612 R R R (c) RB211-524G-T, 524H-T Engines R 72-G613 R Engine - HP Compressor Shaft - Introduction of a reworked HP Compressor Shaft assembly with revised interference bush with improved lead-in chamfer - Mod.72-G613 R R R**Printed in Great Britain**



# RB.211−72−AF964 Page 3 Jun 3/08 Jan.11/13 R(d) Trent 800 Engines R 72-G614 R Engine - HP compressor shaft - Introduction of a reworked HP Compressor Shaft assembly with revised interference bush with improved lead-in chamfer - Mod.72-G614 R R R (2) Trent 500 Engine Manual: Task 72-41-31-200-803, Examine the HP Compressor Stage 1 to 4 Rotor Discs Shaft Assembly. (3) Trent 700 Engine Manual: Task 72-41-31-200-801, Examine the High Pressure (HP) Compressor Rotor Disks Shaft Assembly. (4) Trent 800 Engine Manual: Task 72-41-31-200-801, Examine the High Pressure (HP) Compressor Stage 1 to 4 Rotor Disks Shaft Assembly. (5) RB211-524G-T and 524H-T Engine Manual: Task 72-41-31-200-014, Inspect High Pressure (HP) Compressor Rotor Shaft Assembly - Inspection/Check-00, Config-2 (6) Engine Overhaul Processes Manual TSD594-J: (a) Overhaul Process OP101: Non-Aqueous Vapour and Liquid Degreasing (b) Overhaul Process OP102: Primary Cleaning - Aqueous (c) Overhaul Process OP104: Abrasive Blasting for Cleaning (d) Overhaul Process OP136: Removal of Oxidation and Heat Discolouration from Titanium Parts (e) Overhaul Process OP210: Fluorescent Penetrant Inspection (f) Overhaul Process OP335: Application Of Dry-Film Lubricants 2. Material Information
None**Printed in Great Britain**



# RB.211−72−AF964 Page 4 Jun 3/08 Jan.11/13 R3. Accomplishment Instructions Only corners of the front faces of the following HP Compressor axial dovetail slots are required to be inspected to accomplish this NMSB, see Figure 4: Trent 500: Stage 1 and 2 Trent 700: Stage 1 only (except FK26185 and FK32129) Trent 700: Stage 1 and 2 (FK26185 and FK32129 only) Trent 800: Stage 1 and 2 (except FK24009) Trent 800: Stage 1 (FK24009 only) RB211-524G-T, 524H-T: Stage 1 only
NOTE : Figures 1 to 4 are for illustration only, Trent 700 Compressor Rotor Shafts are shown as an example. General Tasks identified by OP (Overhaul Process) are in the Engine Overhaul Processes Manual, TSD594-J.
CAUTION : COTTON GLOVES MUST BE WORN AT ALL TIMES WHEN HANDLING THE HP COMPRESSOR DRUM. A. Disassemble the HP Compressor Rotor Assembly following Engine Manual requirements.

NOTE : To carry out this NMSB on Trent 500 and Trent 800 HP Compressor drums, it is not required to remove the Stage 1 to 4 Compressor drum from the Stage 5 and 6 Compressor drum. B. Primary clean to OP101 (Non-Aqueous Vapour and Liquid Degreasing) or OP102 (Primary Cleaning - Aqueous).

C. Remove Dry Film Lubricant (DFL) to OP104 (Abrasive Blasting for Cleaning) Subtask 70-00-00-120-104-004 or Subtask 70-00-00-120-104-005

D. Clean to OP136 (Removal of Oxidation and Heat Discolouration from Titanium Parts) Subtask 70-00-00-110-136-002 if the surface is not sufficiently cleaned to carry out the FPI inspection.**Printed in Great Britain**



# RB.211−72−AF964 Page 5 Jun 3/08 Jan.11/13 RE. Carry out local FPI to OP210 (Subtask 70-00-00-230-210-002) at applicable axial dovetail slots following the steps that follow. (1) Ensure part has cooled to 38 deg.C (100 deg.F) or less (comfortable to touch) (2) Apply OMat 652 Penetrant, 30 minutes minimum contact time. Check for full coverage. Do not exceed 60 minutes. (3) First wash at 25psi (0.17MPa) maximum (Max). Verify wash under UV light. (4) Emulsify one minute plus or minus 15 seconds, including travel time. (5) Second wash at 25psi (0.17MPa) Max. Verify wash under UV light. (6) Blow off excess water at 25psi (0.17MPa) Max. (7) Oven dry at 70 deg.C, plus or minus 10 deg. C (158 deg.F, plus or minus 18 deg.F) for 20 minutes Max. Move parts to next step immediately after removing them from the oven. (8) Apply OMat 606 (or approved alternative) developer for 30 to 60 minutes. (9) Air blow off excess developer at 10psi (0.069MPa) Max. (10) Inspection: (a) Complete the inspection within two hours of application of developer. (b) Ensure all curtains/doors are fully closed in the inspection booth. Max 5 lux ambient white light. (c) Ensure drum is correctly centred on a turntable or horizontal viewing fixture. If a turntable is used, make sure the drum runs true when it is rotated. (d) Position UV lamps at 90 degrees apart, with the focal spot of both lamps directed on the dovetail, as shown in Figure 1. Liquid guide lights may be used instead of UV lamps as long as they are of an approved type and meet minimum output requirement of 1000microWatts/sq.cm. (e) Set binoculars to 6 to 8 x magnification. (f) Use white light to aid focusing the binoculars onto the dovetails. (g) Allow three minutes eye adaptation time. (h) Carefully binocular inspect, at 6 to 8 x magnification, each dovetail in turn under UV; pay particular attention to both acute and obtuse angles, as shown in Figures 1 to 4. A mirror may be used as an aid.**Printed in Great Britain**



# RB.211−72−AF964 Page 6 Jun 3/08 Jan.11/13 R(i) If any cracks are found - Reject. For any other anomalies use Engine Manual limits, see References (1.H.).
NOTE : Keep hands and items away from the area being inspected to reduce excessive fluorescence. (11) Re-apply the DFL to OP335 (Application Of Dry-Film Lubricants). (12) Reassemble module and inspect in accordance with the Engine Manual requirements.**Printed in Great Britain**



# RB.211−72−AF964 Page 7 Jun 3/08 Jan.11/13 RPosition of UV lamps Figure 1**Printed in Great Britain**



# RB.211−72−AF964 Page 8 Jun 3/08 Jan.11/13 RAcute angle Figure 2**Printed in Great Britain**



# RB.211−72−AF964 Page 9 Jun 3/08 Jan.11/13 RObtuse angle Figure 3**Printed in Great Britain**



# RB.211−72−AF964 Page 10 Jun 3/08 Jan.11/13 RKey Inspection Areas Figure 4**Printed in Great Britain**



# RB.211−72−AF964 Page 11 Jun 3/08 Jan.11/13 R