P.O. Box 31, DERBY DE24 8BJ, UK Telephone: 44 (0) 1332 242424 Fax: 44 (0) 1332 249936 

# Rol Is-Royce
m

The technical information contained in this document has been approved under the authority of - See Planning Information, Approval.
Signed Date Jul. 7/11
N. J. Wright

RB211 TRENT 700 AND TRENT 800 SERIES PROPULSION SYSTEMS NON-MODIFICATION SERVICE BULLETIN 

# ALERT

This document transmits Revision 2 to Service Bulletin RB211-72-AGO85
Document History Service Bulletin Revision Status Initial Issue Jun. 2/09 Revision 1 Sep. 27/10
Bulletin Revision 2
Remove All pages of the Service Bulletin

All pages of Appendix 1 Supplement Revision Status

Incorporate Pages 1 to 26 of the Service Bulletin

Page 1 and 2 of Appendix 1



# ALERT Reason for change To amend visual inspection acceptance criteria and move Accomplishment Instructions (3.B.) to (3.C.). To amend Fig.1 and Appendix 1 Table 1 To amend visual inspection acceptance criteria and move Accomplishment Instructions (3.B.) to (3.C.). To amend Fig.1 and Appendix 1 Table 1

Transmittal 

### - Page 1 of 3

CHECK THAT ALL PREVIOUS TRANSMllTALS HAVE BEEN INCORPORATED If any have not been received please advise Customer Data Services, Rolls-Royce plc, Derby, England O Rolls-Royce plc (date as above) Printed in Great BritainAll pages of Appendix 2 Page 1 and 2 of Appendix 2 To amend visual inspection acceptance criteria and move Accomplishment Instructions (3.B.) to (3.C.). To amend Fig.1 and Appendix 1 Table 1Printed in Great Britain



# RB.211−72−AG085 Transmittal - Page 2LIST OF EFFECTIVE PAGES The effective pages to this Service Bulletin following incorporation of Revision 2 are as follows: Page Revision Number Revision Date

Bulletin R 1 2 Jul.7/11 R 2 2 Jul.7/11 R 3 2 Jul.7/11 R 4 2 Jul.7/11 R 5 2 Jul.7/11 R 6 2 Jul.7/11 R 7 2 Jul.7/11 R 8 2 Jul.7/11 R 9 2 Jul.7/11 R 10 2 Jul.7/11 R 11 2 Jul.7/11 R 12 2 Jul.7/11 R 13 2 Jul.7/11 R 14 2 Jul.7/11 R 15 2 Jul.7/11 R 16 2 Jul.7/11 R 17 2 Jul.7/11 R 18 2 Jul.7/11 R 19 2 Jul.7/11 R 20 2 Jul.7/11 R 21 2 Jul.7/11 R 22 2 Jul.7/11 R 23 2 Jul.7/11 R 24 2 Jul.7/11 R 25 2 Jul.7/11 R 26 2 Jul.7/11 Appendix 1 R 1 2 Jul.7/11 R 2 2 Jul.7/11 Appendix 2 R 1 2 Jul.7/11 R 2 2 Jul.7/11Printed in Great Britain



# RB.211−72−AG085 Transmittal - Page 31. Planning Information A. Effectivity (1) Boeing 777 Trent 800 Engines - All marks. (2) Airbus A330 Trent 700 Engines - All marks.
B. Reason (1) Problem Cracking of the rear balance land has been found on two Trent 800 IP compressor shafts and on one Trent 700 IP compressor shaft. In response to the first finding on the Trent 800 Non-Modification Service Bulletin (NMSB) 72-AF260 (see References (1.H.)) was raised to specify in-shop visual inspection of the rear balance land for the Trent 500, Trent 700 and Trent 800 engine fleets. In addition NMSB 72-AF313 (see References (1.H.)) has been raised to specify on-wing borescope inspection of the balance land on Trent 800 engines. Initial Issue of NMSB 72-AG085 was raised to specify an enhanced crack detection technique, Eddy Current Inspection, for the rear balance land. This was to be done in-shop on Trent 700 and Trent 800 engines. Revision 1 of this NMSB incorporated R a procedure to determine if an indication was R spurious or genuine. (2) revision 2 of this NMSB is issued to revise the visual inspection acceptance criteria and also note that the NMSB is subject to an EASA Airworthiness Directive (AD). R R R (3) Substantiation This NMSB instructs an Eddy Current inspection of the IP Compressor Shaft rear balance land. (4) Objective Incorporation of this NMSB is to maintain reliability and obtains data to support engineering analysis. ENGINE - IP COMPRESSOR SHAFT EDDY CURRENT INSPECTION OF BALANCE LAND - NON MODIFICATION SERVICE BULLETIN - NON - MOD.72-AG085Printed in Great Britain



# RB.211−72−AG085 Page 1 of 30 Jun. 2/09 Jul. 7/11 R(5) Effect of Bulletin on: (a) Operation Not affected. (b) Maintenance Not affected. (c) Overhaul Affected (see 3. Accomplishment Instructions). (d) Repair Schemes Not affected. (e) Interchangeability Not affected. C. Compliance
ALERT This Service Bulletin should be accomplished at shop visit, on all engines sufficiently disassembled to access the Intermediate Pressure (IP) compressor module rear face. This NMSB need not be accomplished on IP compressor shafts that have a life of zero cycles since new. This NMSB is subject R to EASA AD 2010-0266. D. Approval The technical content of this Non-Modification Service Bulletin was approved under the authority of Design Organisation Approval EASA.21J.035 on Jun. 1/09, re-approved on Sep.24/10 R R and on Jul. 5/11. E. Manpower (1) Time to remove the balance weights 0.25 manhours.Printed in Great Britain



# RB.211−72−AG085 Page 2 Jun. 2/09 Jul. 7/11 R(2) Time to inspect 2.0 manhours.
NOTE : The ECI Technique described in Section 3. Accomplishment Instructions must only be carried out by personnel approved to the applicable national standard (EN4179, NAS 410 or equivalent) at level 2 or higher. (3) Time to install the balance weights 0.25 manhours. F. Material Price and Availability
None. G. Tooling Price and Availability

PART NUMBER PART NAME USAGE AMO FUNCTION
OMat 256 Teflon Tape *** Adhesive tape OMat 261 Temporary Marker *** Pencil/Crayon HU82284 Eddy Current Inspection Kit *** Containing carriage, working standard and probe Usage column abbreviation A - accomplish M - maintenance O - overhaul H. References Rolls-Royce RB211 ALERT Non-Modification Service Bulletin (1) 72-AF260 Engine - IP compressor shaft - Visual inspection of balance land - Non-Modification Service Bulletin (2) 72-AF313 Engine - IP compressor shaft - Visual borescope inspection of balance land - Non-Modification Service BulletinPrinted in Great Britain



# RB.211−72−AG085 Page 3 Jun. 2/09 Jul. 7/11 R2. Material Information A. Parts required to accomplish this Non-Modification Service Bulletin All Engines 72-32-31
FIG ITEM NO. NEW PART NO. QTY PART TITLE MAT OLD PART NO. INSTR DISP
01450 AS44702 AR BOLT, 0.190 in. dia x 0.335 in. VU1653 -- - 01452 AS44691 AR WASHER, VU1653 - - -
NOTE : Quantity As Required (AR) up to a maximum of 4.Printed in Great Britain



# RB.211−72−AG085 Page 4 Jun. 2/09 Jul. 7/11 R3. Accomplishment instructions
CAUTION : YOU MUST ALWAYS WEAR COTTON GLOVES WHEN YOU TOUCH THE SHAFT.
CAUTION : TAKE CARE TO CORRECTLY RECORD WHICH BALANCE WEIGHT AND CLAMP WERE REMOVED FROM WHICH POSITION. THE POSITION OF THE BALANCE WEIGHT SHOULD BE MARKED ON AN AREA THAT IS NOT THE SUBJECT OF THE INSPECTION. THE BALANCE WEIGHT AND CLAMP HAVE TO BE FITTED BACK IN EXACTLY THE SAME POSITION THAT THEY WERE REMOVED FROM.
NOTE : Keep all of the balance weights, clamp plates, washers and bolts if at any stage of the inspection the acceptance criteria are not met. A. Remove balance weight assemblies. (1) Use an OMat 261 temporary marker to show the position of each balance weight. (2) Record the size and position of the balance weights on the attached inspection sheet, see Appendix 1. (3) Remove the balance weight assemblies (balance weight, clamp, washer and bolt) from the balance land and retain these components. (4) Clean the areas to be inspected using a dry cloth.
NOTE : Take care not to erase the temporary markings that show the position of the balance weights. B. Eddy current inspection of the balance land. (1) Equipment requirements. (a) Phase Display Eddy Current Instrument and probe connecting cable. Rohmann Elotest B1 or equivalent. (b) OMat 256 - Teflon Tape
NOTE : The following tooling has been specially developed for the inspection and alternative tooling is not to be used. (c) The following probe carriage and working standard are available from Rolls-Royce as a Kit HU82284 having the following parts: (i) Working standard HU82285 (Ti6/4) (ii) Probe carriage comprising the following parts: Universal carriage UCBL-1 Horizontal sensor slide for face scans SSBL-BPrinted in Great Britain



# RB.211−72−AG085 Page 5 Jun. 2/09 Jul. 7/11 RChamfer sensor slide for chamfer scans SSBL-A Vertical sensor slide for outside diameter scans SSBL-C Eddy current probe MDK-1 H-1803.02.1 Spare O ring tyres. The O ring dimensions are inside dia 7 mm x 1 mm. Suitable O rings are available from Rohmann, Part No. OR7X1NI70 (d) An applicable probe to instrument connecting cable is required. For Elotest instruments the part number is EK-2HF/1 available from Rohmann. Connecting leads for other instruments are also available from Rohmann. (2) Preparation for inspection. (a) Make sure the disc balance land is in a clean condition to prevent false indications and that the balance weights are removed. (b) Identify the Shafts Datum position in accordance with Accomplishment Instructions (3.B.(10)). R (c) Switch the Eddy Current instrument on and leave to warm up for 10 minutes or in accordance with the instrument manufacturers instructions. Switch the display to X-Y. (d) Position the Teflon tape on the face of the probe (MDK-1 H-1803) as shown in Fig.6. (e) Locate the probe assembly alignment dots, one on the probe body and one on each of the sensor slides. (f) Install probe MDK-1 H-1803 to face scan horizontal sensor slide SSBL-B, aligning the dots on the probe body and slide. Install the assembly to the universal carriage UCBL-1. Refer to Fig.7. Make sure the locking mechanism is fully engaged. Refer to Fig.8. (g) Make sure that there are no loose or worn parts on the tooling before and after use. (h) Put the fully assembled carriage on the disc and if necessary adjust the outer wheels of the carriage so that there is not too much movement in the channel between the dovetail slots and the outer diameter of the balance land. Make sure the face of the eddy current probe is flush with the balance land face.Printed in Great Britain



# RB.211−72−AG085 Page 6 Jun. 2/09 Jul. 7/11 R(3) Initial probe/instrument set-up - necessary for new probe/instrument combination. (a) Switch the instrument on and let it warm up for 10 minutes or in accordance with the instrument manufacturers instructions. Make sure the probe to instrument cable is connected. (b) Set the FREQUENCY to 3.0 MHz. (c) If necessary set the instrument up for a Bridge Reflection probe and set the optimum instrument conditions. (d) Set the display spot position to the centre of the screen and the spot persistence to approx 1.0 seconds (e) Set the HIGHPASS FILTER Off (0Hz), set the LOWPASS FILTER to 80Hz. (f) Adjust the Phase Angle and Sensitivity controls to suit the inspection requirements of individual probes. (g) Where an Elotest B1 instrument is used, set the Preamp Gain to 12 dB, Main Gain to 18 dB and Y Axis Spread to 12 dB, giving an overall Gain of 42 dB. The gain values are estimates for an Elotest B1 instrument, to make sure the notch signal is not more than Full Screen Height (FSH). Initially adjust to suit the applicable eddy current instrument to be used for the inspection to make sure there is a signal response from the notch to FSH. (h) Put the carriage on to the working standard HU82285 with the probe coil set approximately in the centre of the width of the face, away from the EDM notch. Push down to make sure the carriage wheels touch fully the base of the working standard and NULL the probe. Lift the Carriage a small distance from the surface and adjust signal to give a horizontal spot movement, which will move from left to right as the eddy current probe lifts from the surface. The Lift-Off signal is now correctly set. (i) Make sure the carriage wheels touch fully with the base of the working standard and move the eddy current probe over the notch in the face of the working standard. Compress the probe coil spring and apply a constant load to the coil. The phase angle from the signal response will be seen to be approximately vertical. Refer to Fig.5. (j) Find the notch, adjust the Gain (dB) control to move the amplitude from the notch signal to full screen height. Refer to Fig.5. (k) Record and keep all the instrument settings on a data card almost the same as shown in Appendix 2.Printed in Great Britain



# RB.211−72−AG085 Page 7 Jun. 2/09 Jul. 7/11 R(4) Calibration before inspection. (a) Set up the instrument, refer to the data card for the eddy current probe to be used. Make sure all settings have been set up correct. Set the X-Y display. Make sure the Teflon tape fitted to the face of the probe is in good condition. If not replace it. Refer to Accomplishment Instructions (3.B.(2)(d)). R (b) If necessary, install probe MDK-1 H-1803 to face scan Horizontal Sensor Slide SSBL-B, aligning the dots on the probe body and slide. Install the assembly to the Universal Carriage UCBL-1. Refer to Fig.7. Make sure the locking mechanism is fully engaged. Refer to Fig.8. (c) Put the probe onto the surface of the working standard HU82285 with the probe coil set approximately in the centre of the width of the face, away from the EDM notch. Push down and NULL the probe. Lift the Carriage a small distance to make sure the signal gives a horizontal spot movement, which will move from left to right as the eddy current probe lifts from the surface. (d) Make sure the carriage wheels touch fully with the base of the working standard and move the eddy current probe over the notch in the face of the working standard. The phase angle from the signal result should be monitored to be approximately vertical and the amplitude result from the notch signal must be full screen height. Refer to Fig.5. (e) Do not use the probe if the correct sensitivity cannot be achieved using the settings recorded before, until the reason for the change can be given. (5) Balance land rear face inspection - Horizontal sensor slide SSBL-B. (a) Set up the instrument, refer to the data card for the probe to be used. Make sure all items have been set up correct. Set the X-Y display. Make sure the Teflon tape fitted to the face of the probe is in good condition. If not replace it. Refer to Accomplishment Instructions (3.B.(2)(d)). R (b) Install probe MDK-1 H-1803 to face scan horizontal sensor slide SSBL-B, aligning the dots on the probe body and slide. Install the assembly to the universal carriage UCBL-1. Refer to Fig.7. Make sure the locking mechanism is fully engaged. Refer to Fig.8. Turn the thumb-wheel to move the index indicator on the probe to the first index position, near the thumb-wheel, on the Horizontal Sensor Slide SSLB-B. Make sure the carriage wheel tyres are in good condition. (c) Identify the Shafts Datum No.1 position. Refer to Accomplishment Instructions (3.B.(11)). R Carefully place the carriage on the balance land and push down until the probe tip is flush to the balance land face. Push the probe tip back through the probe body until the probe carriage wheels are sitting accurately on the diaphragm face.Printed in Great Britain



# RB.211−72−AG085 Page 8 Jun. 2/09 Jul. 7/11 R(d) Null the probe. To find out if the probe touches, lift the probe holder a small distance from the surface, which must show a large horizontal movement of the spot on the display screen. (e) Push the carriage to move the probe around the face to do the scan. Be careful with the areas where the balance weight(s) were removed. Make sure the full 360 degrees of the balance land is inspected. If the carriage is moved around the balance land, in one direction, make sure the cable does not become wound up. (f) Index the probe to the next increment. This is a half turn of the thumb-wheel. A click should be felt as the index plunger drops into position at each half turn. Visually inspect the vernier mark between the probe body and the index shoe. (g) Repeat Accomplishment Instructions 3.B.(5)(e) R and (f), nulling the probe as necessary until all the face is inspected. If an indication is seen, refer to Accomplishment Instructions (3.B.(8) R and 3.B.(9)). Record all indications on the form in Appendix 1. (6) Balance land recess outside diameter inspection - Vertical sensor slide SSBL-C. (a) Set up the instrument, refer to the data card for the probe to be used. Make sure that all items have been set up correct. Set the X-Y display. Make sure the Teflon tape on the face of the probe holder is in good condition. If not replace it. Refer to Accomplishment instructions (3.B.(2)(d)). R (b) Install probe MDK-1 H-1803 to outside diameter scan vertical sensor slide SSBL-C, aligning the dots on the probe body and slide. Install the assembly to the universal carriage UCBL-1. Refer to Fig.8. Make sure the locking mechanism is fully engaged. Refer to Fig.8. Turn the thumb-wheel to move the index indicator on the probe to the first index position, near the thumb-wheel on the Vertical Sensor Slide SSBL-C. Make sure the support wheel tyres are in good condition. (c) Identify the Shafts Datum No.1 position. Refer to Accomplishment Instructions (3.B.(11)). R Carefully place the probe carriage on the balance land and push down until the probe tip is on the outside diameter face, take care not to damage the probe tip as it passes over the outside diameter. Push the probe tip back into the probe body, as it is put on the outside diameter, until the probe carriage wheels sit correct on the diaphragm face. (d) Null the probe. To find out if the probe touches, lift the probe holder slightly from the surface, which must show a large horizontal movement of the spot on the display screen.Printed in Great Britain



# RB.211−72−AG085 Page 9 Jun. 2/09 Jul. 7/11 R(e) Push the probe carriage to move the probe around the outer diameter to do the scan. Be careful with the areas where the balance weight(s) were removed. Make sure the full 360 degrees of the balance land is inspected. If the probe carriage is moved around the outer diameter, in one direction for each increment, make sure the cable does not become wound up. (f) Index the probe to the next increment. This is a half turn of the thumb wheel. A click should be felt as the index plunger drops into position at each half turn. Visually inspect the vernier mark between the probe body and the index shoe. (g) Repeat Accomplishment Instructions (3.B.(6)(e) R and (f)), nulling the probe as necessary, until all the face is inspected. If an indication is seen, refer to Accomplishment Instructions (3.B.(8) R and 3.B.(9)). Record all indications on the form in Appendix 1. (7) Balance land chamfer face inspection - Chamfer sensor slide SSBL-A (a) Set up the instrument, refer to the data card for the probe to be used. Make sure all items have been set up correct. Set the X-Y display. Put Teflon tape on the face of the probe holder. Refer to Fig.6. (b) Install probe MDK-1 H-1803 to chamfer scan Chamfer Sensor Slide SSBL-A, aligning the dots on the probe body and slide. Install the assembly to the Universal Carriage UCBL-1, refer to Fig.9. Make sure the locking mechanism is fully engaged. Refer to Fig.8. Turn the thumb wheel to move the index indicator on the probe to the first index position, near the thumb wheel on the probe shoe. Make sure the support wheel tyres are in good condition. (c) Identify the Shafts Datum No 1 position. Refer to Accomplishment Instructions (3.B.(11)). R Carefully place the probe carriage on the balance land and push down until the probe tip is flush to the balance land face. Push the probe tip back through the probe body until the probe carriage wheels sit correct on the chamfer face. (d) Null the probe. To find out if the probe touches, lift the probe holder slightly from the surface which must show a large horizontal movement of the spot on the display screen. (e) Push the probe carriage to move the probe around the chamfer to do the scan. Be careful with the areas where the balance weight(s) were removed. Make sure the full 360 degrees of the balance land is inspected. If the probe carriage is moved around the balance land in one direction, make sure the cable does not become wound up.Printed in Great Britain



# RB.211−72−AG085 Page 10 Jun. 2/09 Jul. 7/11 R(f) Index the probe to the next increment. This is a half turn of the thumb-wheel. A click should be felt as the index plunger drops into position at each half turn. Visually inspect the vernier mark between the probe body and the index shoe. (g) Repeat Accomplishment Instructions 3.B.(7) R (e) and (f), nulling the probe as necessary, until the complete face is inspected. If an indication is seen, refer to Accomplishment Instructions (3.B.(8) R and 3.B.(9)). R Record all indications on the form in Appendix 1. (8) Interpretation of the eddy current instrument CRT screen display. (a) Defects will show again and again on the X-Y display as a signal rising in a line from the centre spot, which is between vertical and 30 degrees from the vertical, as the probe passes over the defect. To confirm an indication is correct, make sure the area is clean and the signal will show again and again. Refer to Fig.5. (b) Transient signals can be seen which may look almost the same as defects. These will not be seen again and again, and can be ignored. (c) As the probe is moved around the scalloped area of the Balance Land face, a signal moving in a downward direction, the opposite direction to a notch signal will be seen and can be ignored in this area. Refer to Fig.11. (d) Be careful while the probe is moved around this area as defects can occur between the scalloped areas. Refer to Fig.12. (9) Procedure for determining if an indication is spurious or genuine. If an indication is found in section 3.B.(5), R (6) or (7) and passes the inspections in section 3.B.(8) R then the following procedure must be used to determine if the indication is spurious or a genuine crack signal. (a) Set the HIGHPASS FILTER to ON and set the frequency to 5 Hz. (b) Set the LOWPASS FILTER frequency to 50 Hz (c) If necessary, install the probe MDK-1H-1803 to the face scan horizonal sensor slide SSBL-B. (i) Align the dots on the probe body and slide. (ii) Install the assembly to the universal carriage UCBL-1. Refer to Fig.7. (iii) Make sure the locking mechanism is fully engaged. Refer to Fig.8.Printed in Great Britain



# RB.211−72−AG085 Page 11 Jun. 2/09 Jul. 7/11 R(d) Put the probe onto the surface of the working standard HU82285 with the probe coil set approximately in the centre of the width of the face, away from the EDM notch. (e) Push down and null the probe. (f) Make sure the carriage wheels touch fully with the base of the working standard HU82285 and move the eddy current probe over the notch in the face of the working standard HU82285. (g) Adjust the phase angle so that the notch signal is vertical. (h) Adjust the gain so that the notch signal is at full screen height. (i) Inspect the area again on the balance land only where the indication was found. (i) If a vertical signal is seen in this area, the indication must be a genuine crack signal. (ii) If no vertical signal can be seen in this area, then the indication found in section 3.B.(5), R (6) or (7) must be a spurious signal and must be ignored.
NOTE : With the HIGHPASS FILTER set to ON, the probe lift-off will show as a vertical spot movement, therefore take care not to interpret the lift-off of the probe as a crack signal. (10) Acceptance criteria: If an indication is identified as a crack signal following steps 3.B.(8) R and 3.B.(9) R the Shaft must be rejected. Do not complete section 3.C. and perform any dressing repair of damage or frettage marks. R R The inspection results must be recorded on the form in Appendix 1. The IP compressor shaft, balance weights, clamp plates, washers and bolts must be quarantined. The location shall be visually inspected and the results reported to Rolls-Royce via your local representative. (11) Datum position of shaft: Record all indications from the datum, centre of the IPC stage 8 blade loading-slot. C. Visual inspection of the balance land . R (1) Visually inspect, using a 10x magnifying lens and a torch, along the circumference of the balance land. Look for damage, frettage or marks in the zone marked in Fig.1. Also refer to Fig.2 and Fig.3: R R R (2) Record the condition of the balance land on the attached inspection sheet. Refer to Appendix 1. R RPrinted in Great Britain



# RB.211−72−AG085 Page 12 Jun. 2/09 Jul. 7/11 R(3) Acceptance Criteria: R Refer to Trent 700 or Trent 800 Engine Manual 72-32-31, Examine the IP compressor stage 1 to 8 shaft assembly. R R If the compressor shaft is rejected, quarantine the IP compressor shaft, balance weights, clamp plates, washers and bolts. Photograph the mark and send the image to Rolls-Royce, via your local representative. R R R D. Inspect and Re-fit the Balance Weights (1) Clean the balance weights and clamps in accordance with Engine Manual, TASK 72-32-31-100-804. (2) Inspect the clamps in accordance with Engine Manual, SUBTASK 72-32-31-210-015. (3) Inspect the balance weights for frettage and record the results in Appendix 1, inspection sheet. (a) If frettage is found on the balance weight: (i) Weigh the balance weight assembly (balance weight, clamp, washer and bolt). (ii) Keep, but do not install, the original balance weight, clamp plate, washer and bolt and refer to Rolls-Royce, via your local representative. (iii) Install the balance weight assembly. The weight of the new balance weight assembly (new balance weight, new clamp, new washer and new bolt) must be within 0,1 g of the original balance weight assembly. (iv) Install the new balance weight and the clamp in the same position as they were removed from. A new washer and a new bolt are necessary for each balance weight and clamp to be installed. Torque the bolt to 4 Nm (35 lbfin.). Bend both sets of locking tabs against the hexagon take care not to damage the nut. This is to make sure that the washer stays in contact with the nut if the bolt clamping-load decreases, thus allowing the key-washer to become loose. (v) Make sure that all temporary markings produced by Accomplishment Instructions (3.A.(1)) are removed. (b) If no frettage is found on the balance weight: (i) Keep the balance weight so that it can be installed. (ii) Discard the washer and bolt.Printed in Great Britain



# RB.211−72−AG085 Page 13 Jun. 2/09 Jul. 7/11 R(iii) Inspect the clamp plate. If it is damaged or bent, keep it but do not install it, refer to Rolls-Royce, via your local representative and install a new clamp plate. If it is not damaged or bent then it can be installed. (iv) Install the balance weight and the clamp in the same position they were removed from. A new washer and a new bolt for each balance weight and clamp are to be installed. Torque the bolt to 4 Nm (35 lbfin.). Bend both sets of locking tabs against the hexagon, take care not to damage the nut. This is to make sure that the washer stays in contact with the nut if the bolt clamping-load decreases, thus allowing the key-washer to become loose. (v) Make sure that all temporary markings produced by Accomplishment Instructions (3.A.(1)) are removed. E. Record of Accomplishment (1) Complete the form in Appendix 1 and send to Rolls-Royce via your local representative. (2) Accomplishment of this Non-Modification Service Bulletin is to be recorded in the engine logbook.Printed in Great Britain



# RB.211−72−AG085 Page 14 Jun. 2/09 Jul. 7/11 RR

Inspection Zone R Fig.1 RPrinted in Great Britain



# RB.211−72−AG085 Page 15 Jun. 2/09 Jul. 7/11 RThe Damage Mark at the Start of the Crack in the First Find Fig.2Printed in Great Britain



# RB.211−72−AG085 Page 16 Jun. 2/09 Jul. 7/11 RThe Damage Mark at the Start of the Crack in the Second Find (Note: The land has been bent backwards to reveal crack) Fig.3Printed in Great Britain



# RB.211−72−AG085 Page 17 Jun. 2/09 Jul. 7/11 RHU82285 Working Standard Fig.4Printed in Great Britain



# RB.211−72−AG085 Page 18 Jun. 2/09 Jul. 7/11 RTypical Calibration Display Fig.5Printed in Great Britain



# RB.211−72−AG085 Page 19 Jun. 2/09 Jul. 7/11 RPTFE Tape Placed on the Eddy Current Probe Fig.6Printed in Great Britain



# RB.211−72−AG085 Page 20 Jun. 2/09 Jul. 7/11 RProbe Placed to Inspect Balance Land Face Fig.7Printed in Great Britain



# RB.211−72−AG085 Page 21 Jun. 2/09 Jul. 7/11 RProbe Placed to Inspect Outer Diameter Fig.8Printed in Great Britain



# RB.211−72−AG085 Page 22 Jun. 2/09 Jul. 7/11 RProbe Placed to Inspect Balance Land Chamfer Fig.9Printed in Great Britain



# RB.211−72−AG085 Page 23 Jun. 2/09 Jul. 7/11 RScallop Area on the Shaft Fig.10Printed in Great Britain



# RB.211−72−AG085 Page 24 Jun. 2/09 Jul. 7/11 RTypical Screen Display from Scallop Area Fig.11Printed in Great Britain



# RB.211−72−AG085 Page 25 Jun. 2/09 Jul. 7/11 RScreen Display of Notch in Scallop Area Fig.12Printed in Great Britain



# RB.211−72−AG085 Page 26 Jun. 2/09 Jul. 7/11 RAppendix 1Printed in Great Britain



# RB.211−72−AG085 Page 27 Jun. 2/09 Jul. 7/11 RR

Table 1 RPrinted in Great Britain



# RB.211−72−AG085 Page 28 Jun. 2/09 Jul. 7/11 RAppendix 2Printed in Great Britain



# RB.211−72−AG085 Page 29 Jun. 2/09 Jul. 7/11 Rdef0013583 INSTRUMENT SETTINGS Frequency Preamp gain Mainamp gain Axis Spread Y Phase angle Sensitivity Filter LP Filter MF/HF/LF HP Filter Bandwidth Gates 3.0 MHz dB dB dB

° 100%FSH
80Hz HF Static Test Piece Details: HU 82285

Instrument Details:
Serial No:

CRT Display X−Y / Y−T X−Y QAS: Report defect indications to Rolls−Royce Service Engineering Probe Details: Rohmann Pt No: MDK−1 H−1803 Serial No: Approved By: Raised By:
Date: Page 1of 1 Page ( s ) Area Inspected: Trent 700 Trent 800 Stage 1−8 Shaft Balance Land Issue No: 01 Part No: VARIOUS Matl :Ti 6246 (TJK) Serial No: Technique No: Title: T700 and T800 IPC Stage 1−8 Shaft balance land Eddy Current Inspection NDT DATA CARD EDDY CURRENT INSPECTION

INSPECTION DETAILS Form to be completed and retained for each new combination of probe and instrument

Engine: TRENT700 TRENT800

R

Table 2 RPrinted in Great Britain



# RB.211−72−AG085 Page 30 Jun. 2/09 Jul. 7/11 R