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 Dec.6/12 R 2 3 Dec.6/12 R 3 3 Dec.6/12 R 4 3 Dec.6/12 R 5 3 Dec.6/12 R 6 3 Dec.6/12 R 7 3 Dec.6/12 R 8 3 Dec.6/12 R 9 3 Dec.6/12 R 10 3 Dec.6/12 R 11 3 Dec.6/12 R 12 3 Dec.6/12 R 13 3 Dec.6/12 R 14 3 Dec.6/12 R 15 3 Dec.6/12 R 16 3 Dec.6/12 R 17 3 Dec.6/12 R 18 3 Dec.6/12 R 19 3 Dec.6/12 R 20 3 Dec.6/12 Appendix 1 R 1 3 Dec.6/12 R 2 3 Dec.6/12 Appendix 2 R 1 3 Dec.6/12 R 2 3 Dec.6/12**Printed in Great Britain**



# RB.211−72−AG183 Transmittal - Page 21. Planning Information A. Effectivity (1) Boeing 747 RB211-524B2-19, 524C2-19, 524D4-19, 524D4-B-19, 524D4-39: Only engines that are post SB72-7221. All RB211-524G2-19, 524G3-19, 524H2-19 engines. (2) Boeing 767 All RB211-524H-36 engines. (3) Lockheed L1011 RB211-524B-02, 524B3-02, 524B4-02: Only engines that are post SB72-7221.
NOTE : In certain circumstances, you may comply with this Non-Modification Service Bulletin (NMSB) without applying the Accomplishment Instructions that are specified in Section 3. Section 1.D. Compliance gives further details.
B. Reason During troubleshooting of a starting problem with a RB211-535E4-B engine, the Fuel Spray Nozzles (FSN's) appeared misaligned and the engine was removed. Strip investigation found that the FSN's were correctly positioned but that the Front Combustion Liner (FCL) metering panel (EIPC 72-41-13, Fig/Item 02-324) was cracked and distorted. Laboratory investigation revealed that the FCL metering panel was to an incorrect material specification (N75 material, rather than C263 material), which was determined to be the root cause of the FCL metering panel cracking and distortion. SB 72-7221 was issued, in 1984, to address the issue of Phase 2 FCL N75 metering panel cracking in the early marks of the RB211-524 engine; it replaced the N75 Metering Panel with an improved standard made from C263. The Metering Panel in Phase 2 combustors of the RB211-524G/H and RB211-535C/E4/E4-B engines was specified in C263 material from engine type at entry into service. The use of N75 Metering Panels, where C263 was the intended material, has the proven potential to lead to Metering Panel cracking. Significant Metering Panel cracking could result in hot gas breakout from the engine casing. Revision 1 of this NMSB introduces an alternative alloy sorter. It also allows accomplishment of this NMSB during engine shop visit. ENGINE - COMBUSTION LINER - CHECK OF PHASE 2 FRONT COMBUSTION LINER METERING PANEL MATERIAL - NON MODIFICATION SERVICE BULLETIN - NON - MOD.72-AG183**Printed in Great Britain**



# RB.211−72−AG183 Page 1 of 20 Dec 17/09 R Dec. 6/12Revision 2 of this NMSB extends the timeframe for compliance by a year, following an updated assessment of service findings. Revision 3 of this NMSB instructs taking a swab from the front combustion liner metering panel using emery paper, and sending it to Rolls-Royce for spectroscopic analysis. This should only be done if the inspection shows that the panel is made from N75 material. This revision also introduces amendments to the parts required to accomplish the NMSB. R R R R R C. Description This Non-Modification Service Bulletin (NMSB) instructs an on-wing or shop visit check for correct Metering Panel material, and the withdrawal from service of any parts that have been incorrectly manufactured from N75 material. Advise your Rolls-Royce Service representative of NMSB accomplishment and inspection results, regardless of findings (refer to Appendix 1 and Appendix 2.). D. Compliance
ALERT (1) Inspect all engines listed in section 1.A. Effectivity at the next convenient maintenance opportunity, and no later than 31st July 2013. (2) Inspect ANY Front Combustion Liner stock that can be fitted to those engines listed in Section 1.A. Effectivity within 6 months of Revision 1 of this NMSB.
NOTE : This is a ONCE-ONLY inspection. No form of Non-Destructive Examination certification is required for carrying out the procedures detailed in this NMSB. (3) This NMSB can be incorporated without carrying out the Accomplishment Instructions in Section 3, if either: (a) TV75295 has been incorporated, or (b) The Metering Panel (EIPC 72-41-13, 02-324) was delivered from Rolls-Royce after 23rd April 2007, or (c) NMSB 72-AF572 has been carried out at engine shop visit. E. Approval The technical content of this Non-Modification Service Bulletin was approved under the privilege of Design Organisation Approval EASA.21J.035 on Dec.17/09, Nov.12/10, May.29/12 R R and was re-approved on Dec. 4/12.**Printed in Great Britain**



# RB.211−72−AG183 Page 2 Dec 17/09 R Dec. 6/12F. Manpower R (1) On-wing R To gain access - 15 minutes (1 person). R To remove the FSN - 2 hours (1 person). R To clean and inspect - 0.5 hours (1 person). R To inspect the FCL if incorrect material found - 2 hours (1 person). R To replace the FSN - 2 hours (1 person). R To ground run and leak check - 4 hours (2 person). R To return the engine to a serviceable condition - 15 minutes (1 person). R The Rolls-Royce On-Wing Care Team are available to carry out this procedure. If required, it can be arranged through your local Field Service Office or Customer Service Officer/Manager. R R R
NOTE : This task requires that the Test 2 - Fuel and Oil Leak Test (AMM 71-00-00/501) and Test 13 - High Power Test (AMM 71-00-00/501) be carried out after completion. R R R (2) In shop R To gain access - 15 minutes (1 person). R To remove the FSN - 2 hours (1 person). R To clean and inspect - 0.5 hours (1 person). R To replace the FSN - 2 hours (1 person). R To return the engine to a serviceable condition - 15 minutes (1 person). R
NOTE : This task requires that Test 02 - Gas Generator Fuel and Oil Leak Test (EM 72-00-00-700-006) and Test 05 - Running-in (EM 72-00-00-700-009) be carried out after completion. R R R G. Tooling. The following tooling kit is required to accomplish Part 3 of this NMSB Part No. Description Function**Printed in Great Britain**



# RB.211−72−AG183 Page 3 Dec 17/09 R Dec. 6/12HU82287 Test Equipment Determine FCL Meter Panel material H. References (1) Rolls-Royce RB211 Service Bulletins: (a) 72-AF572 Engine - Combustion liner - Check of phase 2 front combustion liner metering panel material (b) 72-C230 Engine - Module 4 - Introduction of revised HP system incorporating an improved combustor (c) 72-8678 Engine - Miscellaneous Minor Alterations (2) Engine Illustrated Parts Catalogue, 72-41-13, Engine - Combustion Liners. (3) Engine Manual TASK, 72-00-00-700-006, Test No.2 - Gas Generator Fuel and Oil Leak Test. (4) Engine Manual TASK, 72-00-00-700-009, Test 05 - Running-in (5) Engine Manual TASK, 72-00-41-020-041, Remove Fuel Spray Nozzles. (6) Engine Manual TASK, 72-00-41-020-022, Install Fuel Spray Nozzles. (7) Engine Manual TASK, 72-41-13-200-000, Pre SB 72-C230: Inspect Combustion Front Liner Assembly - Inspection/Check-00. (8) Aircraft Maintenance Manual Task, 71-00-00/501, Test 2 - Fuel and Oil Leak check. (9) Aircraft Maintenance Manual Task, 71-00-00/501, Test 13 - High Power Test. (10) Aircraft Maintenance Manual Task, 72-00-00/601, Inspection of the Combustion Section. (11) Aircraft Maintenance Manual TASK, 73-11-05/401, Remove/Install the Fuel Spray Nozzle. (12) Aircraft Maintenance Manual Task, 73-11-06/401, Remove/Install the Fuel Spray Nozzles. (13) NTO 529, Check of Phase 2 Front Combustion Liner Metering Panel for Distortion and Cracking during routine Combustor Borescope.**Printed in Great Britain**



# RB.211−72−AG183 Page 4 Dec 17/09 R Dec. 6/122. Material Information A. Parts required to accomplish this Service Bulletin

Part No. Part Title When Required UP10200 R Ring - Metal R Seal On Condition R BLT5265 Bolts On condition CU37148 R Washer - Wire Locking R On condition UL11027 R Plate, Cover-Fuel Spray Nozzle R On condition AS24012 R Bolt On condition LK64813 R Spacer R On condition AS12944 R Washer R On condition UL21733 Carrier Assembly - Seal Ring (SB 72-8678, Pre SB 72-C230) On condition R**Printed in Great Britain**



# RB.211−72−AG183 Page 5 Dec 17/09 R Dec. 6/123. Accomplishment Instructions A. The accomplishment procedure will depend on the type of alloy sorter kit used:

Alloy Sorter Type Procedure Walker Scientific Inc. ATS-6044T - Alloy Sorter 3.B.

Koslow Scientific Company TE-3000 Thermoelectric Alloy Sorter 3.C.

B. Inspection of the Phase 2 Front Combustion Liners, use Walker Scientific Inc. ATS-6044T - Alloy Sorter.

CAUTION : IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN-FLIGHT SHUTDOWN, POWER LOSS OR OTHER ANOMALIES R 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) Prepare the aircraft for work in accordance with AMM 72-00-00/601 (Prepare the Airplane for the inspection). (2) Remove the Fuel Spray Nozzle (FSN) at position 7 to allow access to the FCL Metering Panel, in accordance with AMM 73-11-06/401 or EM TASK 72-00-41-020-041, Remove Fuel Spray Nozzles. Refer to Fig.1.
CAUTION : YOU MUST ONLY REMOVE THE MINIMUM AMOUNT OF MATERIAL THAT IS NECESSARY TO EXPOSE A BRIGHT AND SHINY SURFACE. REMOVAL OF EXCESSIVE MATERIAL CAN WEAKEN THE FCL METERING PANEL
NOTE : This operation is critical to make sure that an accurate reading is obtained. (3) Clean a small area of the FCL Metering Panel using the supplied 120 grit flap wheel in the rotary power tool. Carefully polish the surface of the Metering Panel to remove any oxidation until the surface is bright and shiny. This should take approximately 3 minutes. Refer to Fig. 2. (4) Make sure that the ATS-6044T - Alloy sorter is fully operational and, make sure the battery is sufficiently charged if the mains electricity supply is not being used. Also make sure that the probes are not misaligned and that the alloy sorter is fully intact and there are no loose parts that could become detached when the apparatus is used.**Printed in Great Britain**



# RB.211−72−AG183 Page 6 Dec 17/09 R Dec. 6/12WARNING : THE HOT TIP OF THE ALLOY SORTER PROBE IS FACTORY PRESET TO OPERATE AT A HIGH TEMPERATURE. AVOID DIRECT CONTACT WITH THE HOT SIDE OF THE PROBE AS INJURY MAY OCCUR
CAUTION : MAKE SURE THAT THE PROBE DOES NOT COME INTO CONTACT WITH THE SURFACES AFFECTED BY HEAT. WHEN THE PROBE IS NOT IN USE, MAKE SURE THAT THE HOT SIDE IS ABOVE THE COLD SIDE
NOTE : Use emery paper only on the side of the test piece that is not marked with the material type. (5) Testing of the Test Pieces using the ATS-6044T - Alloy Sorter.
CAUTION : DO NOT USE THE SAME PIECE OF EMERY PAPER FOR BOTH TEST PIECES. IF YOU USE THE SAME PIECE OF EMERY PAPER IT CAN CAUSE THE READINGS TO BE CONTAMINATED. (a) Remove any dirt, contamination or oxidation from the surface of the test pieces, use fine grade emery paper. Use the side of the test piece not marked with the material type so that this does not get removed. (b) The alloy sorter has 2 probes, one hot and the other cold (these are marked on the apparatus). Clean both of the probes before use, use an acetone wipe. (c) Set the temperature on the alloy sorter to LO.
NOTE : The alloy sorter has HI and LO positions. Make sure that it is set to LO as this will affect the readout. (d) The alloy sorter must be switched on and allowed to warm up until the temperature readout stabilises at between 250 and 280 (this is a read out only - there are no applicable temperature units). (e) Align the probes with the non-marked surface of the supplied N75 test piece and touch the probe marked cold onto the surface first immediately followed by the probe marked hot. Keep both probes in contact with the test piece until the alloy sorter reading stabilises. Record the reading. Repeat this process until 3 consistent readings are obtained. Wait a minimum of 10 seconds before the next reading is carried out. Calculate the average of the 3 consistent readings. (f) Wipe the surface of the test piece with an acetone wipe to remove any potential material contamination from the alloy sorter probes.**Printed in Great Britain**



# RB.211−72−AG183 Page 7 Dec 17/09 R Dec. 6/12WARNING : TAKE CARE NOT TO HANDLE THE HOT PROBE. THIS WILL BURN THE SKIN. (g) Record the 3 readings in Appendix 1 or equivalent. (i) Record the average (mean) of the 3 readings as X in Appendix 1 or equivalent. (h) Repeat steps (5)(d) to (5)(f) for the second test piece marked C263. (i) Record the readings in Appendix 1 or equivalent. (i) Record the average (mean) of the 3 readings as Y in Appendix 1 or equivalent.
NOTE : If at this stage it is not possible to get 3 consistent readings for one of the test pieces, re-clean the surface of the test piece with emery paper and repeat. If this does not correct the problem stop the process and contact your local Rolls-Royce representative. Test piece C263 is the same material as the correct standard of metering panel. (j) Insert the alloy sorter into the combustion case orifice at the removed FSN at position 7 (refer to Fig.3). Use the alloy sorter as per instruction (5)(e), test the cleaned surface of the FCL metering panel (refer to Fig.5). Repeat this process until 3 consistent readings within the applicable value range for either N75 or C263 are obtained, (see Appendix 1 for values X and Y). Wait a minimum of 10 seconds before the next reading is done. Calculate the average of the 3 readings. (k) Record the readings in Appendix 1 or equivalent. (i) Record the average (mean) of the 3 readings as Z in Appendix 1 or equivalent. (l) Check that the alloy sorter is fully intact and that no parts have become detached and dropped into the engine.
CAUTION : YOU MUST ONLY REMOVE THE MINIMUM AMOUNT OF MATERIAL THAT IS NECESSARY TO EXPOSE A BRIGHT AND SHINY SURFACE. REMOVAL OF EXCESSIVE MATERIAL CAN WEAKEN THE FCL METERING PANEL (m) Locally clean the surface of the FCL metering panel where the alloy sorter has been applied using the supplied 120 grit flap wheel in rotary power tool to remove any potential material contamination from the alloy sorter probes.**Printed in Great Britain**



# RB.211−72−AG183 Page 8 Dec 17/09 R Dec. 6/12(n) Repeat steps (5)(d), (e) and (f) on the N75 and C263 sample test pieces to confirm that the alloy sorter still correctly identifies the materials. If the readings differ significantly from those originally recorded in Appendix 1, contact Rolls-Royce Technical Services through your local Field Service Office. (o) If the readings taken on the engine FCL metering panel indicate that it is C263 proceed to step (6)(e). The range indicating that FCL metering panel is made from C263 is Z=Y +/- 3 units. (p) If the reading indicates that the metering panel is N75, contact Rolls-Royce Technical Services through your local Field Service Office and carry out R step (5)(p)(i). The range indicating that FCL metering panel is made from N75 is Z=X +/- 3 units.
CAUTION : YOU MUST ONLY REMOVE THE MINIMUM AMOUNT OF MATERIAL THAT IS NECESSARY FOR A SWAB TO BE TAKEN. REMOVAL OF EXCESSIVE MATERIAL CAN WEAKEN THE FCL METERING PANEL. R R R (i) Take a swab from the surface of the polished area using a fine grade emery paper. Preserve this paper and send to your Rolls-Royce representative. Avoid contamination of this paper. R R R
NOTE : The emery paper will be used for spectroscopic analysis if the inspection shows that the panel is made from N75 material. R R R (q) If the reading is ambiguous (i.e. it cannot be determined whether the metering panel is made from N75 or C263) check that the alloy sorter is set to the LO setting. If it is not, then set to LO and repeat steps (5)(d) to (5)(p). (r) If the alloy sorter is in the LO position and the reading is still ambiguous, stop the process and contact your local Rolls-Royce representative. (6) If the Alloy Sorter reading indicates that FCL Metering Panel is N75 do the following: (a) If NMSB is accomplished at shop visit, the FCL assembly must be replaced with a FCL that conforms to this NMSB or NMSB 72-AF572 before the engine is returned to service. (b) If NMSB is accomplished on-wing, inspect the FCL metering panel for signs of cracking in accordance with AMM 72-00-00/601 - Inspection of the Combustion Liners and HPNGV. NTO529 gives advice with respect to signs of FCL metering panel cracking and distortion. Reject if damage is outside of acceptable limits given in the AMM - the FCL assembly must be replaced with a FCL that conforms to this NMSB or NMSB 72-AF572 before the engine is returned to service.**Printed in Great Britain**



# RB.211−72−AG183 Page 9 Dec 17/09 R Dec. 6/12(c) If this NMSB is accomplished on-wing and the FCL metering panel conforms to AMM acceptance limits, then await Rolls-Royce findings from R R the emery paper sample. Do not exceed the fly-on limits in 3.B(6)(c)(ii). R R (i) If Rolls-Royce confirms that the material in C263 (False Positive), then the engine should be accepted and no further action is required. R R R (ii) If Rolls-Royce confirms that the material is N75, then the complete FCL assembly must be removed and replaced with a FCL that conforms to this NMSB or NMSB72-AF572 within the number of flights specified below: R R R R FCL meter panel total cycles since new (TCSN) R R Fly-on limit

< 3,000 cycles R 400 cycles 3,000 - 7,000 cycles R 100 cycles > 7,000 cycles R 50 cycles
NOTE : Section 1.D. Compliance gives details on how you can determine that the replacement FCL uses a metering panel in C263 material. (d) If the TCSN of the FCL metering panel cannot be determined, use the engine TCSN. (e) Once the inspection is complete, refit the removed FSN in position 7 in accordance with AMM 73-11-06/401 Install the Fuel Spray Nozzle (FSN) or EM TASK 72-00-41-020-022, Install Fuel Spray Nozzle. (f) Use the internal inspection equipment to make sure that the FSN is correctly installed AMM 72-00-00/601 Inspection of the Combustion Liners and HPNGV or EM TASK 72-41-13-200-000, Inspection of front combustion liner. (g) If the NMSB accomplished on-wing, do a pressure test of the system AMM 73-11-11/501. (h) If the NMSB is accomplished on-wing, return the aircraft to its usual condition in accordance with AMM 72-00-00/601 (put the airplane back in its usual condition). (i) Do Test No. 2 - Fuel and Oil Leak (AMM Task 71-00-00/501 or EM TASK 72-00-00-700-006). (j) Do test No. 13 - Take-off Power (AMM Task 71-00-00/501) or Test No.5 Running-in (EM TASK 72-00-00-700-009).**Printed in Great Britain**



# RB.211−72−AG183 Page 10 Dec 17/09 R Dec. 6/12C. Inspect the Phase 2 FCLs, use Koslow Scientific Company TE-3000 thermoelectric alloy sorter.

CAUTION : IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN-FLIGHT SHUTDOWN, POWER LOSS OR OTHER ANOMALIES R 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) Prepare the aircraft for work in accordance with AMM 72-00-00/601 (Prepare the Airplane for the inspection). (2) Remove the Fuel Spray Nozzle (FSN) at position 7 to allow access to the FCL metering panel, in accordance with AMM 73-11-05/401 or EM TASK 72-00-41-020-041, Remove Fuel Spray Nozzles. Refer to Fig.1. (3) Clean a small area of the FCL metering panel using the supplied 120 grit flap wheel in the rotary power tool. Carefully polish the surface of the metering panel to remove any oxidation until the surface is bright and shiny. This should take approximately 3 minutes. Refer to Fig.2.
CAUTION : YOU MUST ONLY REMOVE THE MINIMUM AMOUNT OF MATERIAL THAT IS NECESSARY TO EXPOSE A BRIGHT AND SHINY SURFACE. REMOVAL OF EXCESSIVE MATERIAL CAN WEAKEN THE FCL METERING PANEL MAKE SURE THAT A NEW FLAP WHEEL IS USED EACH TIME TO AVOID CONTAMINATION OF THE FCL.
NOTE : This operation is critical to make sure that an accurate reading is obtained. (4) Make sure that the TE-3000 - Alloy sorter is fully operational. Also make sure that the probes are not misaligned and that the alloy sorter is fully intact and there are no loose parts that could become detached whilst using the apparatus.
WARNING : THE HOT TIP OF THE ALLOY SORTER PROBE IS FACTORY PRESET TO OPERATE AT A HIGH TEMPERATURE. AVOID DIRECT CONTACT WITH THE HOT SIDE OF THE PROBE AS INJURY MAY OCCUR.
CAUTION : MAKE SURE THAT THE PROBE DOES NOT COME INTO CONTACT WITH THE SURFACES AFFECTED BY HEAT. WHEN THE PROBE IS NOT IN USE, MAKE SURE THAT THE HOT SIDE IS ABOVE THE COLD SIDE.
NOTE : Use emery paper only on the side of the test piece that is not marked with the material type.**Printed in Great Britain**



# RB.211−72−AG183 Page 11 Dec 17/09 R Dec. 6/12(5) Testing of the Test Pieces using the TE-3000 - Alloy sorter.
CAUTION : DO NOT USE THE SAME PIECE OF EMERY PAPER FOR BOTH TEST PIECES. IF YOU USE THE SAME PIECE OF EMERY PAPER IT CAN CAUSE THE READINGS TO BE CONTAMINATED. (a) Remove any dirt, contamination or oxidation from the surface of the test pieces, use fine grade emery paper. Use the side of the test piece not marked with the material type so that this does not get removed. Never use the same piece of emery paper for both test pieces as this may contaminate the readings. (b) The alloy sorter has 2 probes. Clean both of the probes before use, using an fine grade emery paper where necessary or an acetone wipe. The hot probe is identified. (c) Plug the TE-3000 alloy sorter into a suitable power supply. (d) Switch the power supply to ON. The amber light will remain constant for about one minute.
WARNING : DO NOT TOUCH THE METAL SHAFT OR TIP OF THE PROBE. THIS WILL BURN THE SKIN. (e) Wait approximately 10 minutes for the probe temperature to stabilise. The amber light will blink regularly to indicate the probe is at the correct temperature. The display LCD must read 0000 +/- 2. (f) Align the probes with the non-marked surface of the supplied N75 test piece and touch the probe marked cold on the surface first, immediately followed by the probe marked hot. Press lightly. Read the number on the alloy sorter display. If required, press down lightly on the alloy sorter one or two times to achieve a clear reading. Record the reading. Repeat the process until 3 consistent readings are obtained. Wait a minimum of 10 seconds between readings. Calculate the average of the 3 consistent R readings.
NOTE : Do not keep probes in contact with the material for more than 2 seconds as the values can drift because of heat dissipation. (g) Record the 3 readings in Appendix 2 or equivalent. (i) Record the average (mean) of the 3 readings as X in Appendix 2 or equivalent. (h) Repeat steps (5)(d) to (5)(f) for the second test piece marked C263.**Printed in Great Britain**



# RB.211−72−AG183 Page 12 Dec 17/09 R Dec. 6/12(i) Record the 3 readings in Appendix 2 or equivalent. (i) Record the average (mean) of the readings as Y in Appendix 2 or equivalent.
NOTE : If at this stage the test piece readings for X and Y do not differ by a minimum of 25 units, re-clean the surface of the test piece with emery paper and repeat. If this does not correct the problem stop the process and contact your local Rolls-Royce representative. Test piece C263 is the same material as the correct standard of metering panel. (j) Insert the alloy sorter into the combustion case orifice at the removed FSN at position 7 (refer to Fig.4). Use the alloy sorter as per instruction (5)(f), test the cleaned surface of the FCL metering panel (refer to Fig.5). Repeat this process until 3 consistent readings within the applicable value range for either N75 or C263 are obtained, (see Appendix 2 for values X and Y). Wait a minimum of 10 seconds before the next reading is done. Calculate the average of the 3 readings. (k) Record the readings in Appendix 2 or equivalent. (i) Record the average (mean) of the 3 readings as Z in Appendix 2 or equivalent. (l) Check that the Alloy Sorter is fully intact and that no parts have become detached and dropped into the engine.
CAUTION : YOU MUST ONLY REMOVE THE MINIMUM AMOUNT OF MATERIAL THAT IS NECESSARY TO EXPOSE A BRIGHT AND SHINY SURFACE. REMOVAL OF EXCESSIVE MATERIAL CAN WEAKEN THE FCL METERING PANEL (m) Locally clean the surface of the FCL metering panel where the alloy sorter has been applied using the supplied 120 grit flap wheel in rotary power tool to remove any potential material contamination from the alloy sorter probes. (n) Repeat steps (5)(d), (e) and (f) on the N75 and C263 sample test pieces to confirm that the alloy sorter still correctly identifies the materials. If the readings are outside the permitted range for either material, contact Rolls-Royce Technical Services through your local Field Service Office. (o) If the readings taken on the engine FCL metering panel indicate that it is C263 proceed to step (6)(e). The range indicating that FCL metering panel is made from C263 is Z=Y +/- 10 units.**Printed in Great Britain**



# RB.211−72−AG183 Page 13 Dec 17/09 R Dec. 6/12(p) If the reading indicates that the metering panel is N75, contact Rolls-Royce Technical Services through your local Field Service Office and proceed to step (5)(p)(i). R The range indicating that FCL metering panel is made from N75 is Z=X +/- 10 units.
CAUTION : YOU MUST ONLY REMOVE THE MINIMUM AMOUNT OF MATERIAL THAT IS NECESSARY FOR A SWAB TO BE TAKEN. REMOVAL OF EXCESSIVE MATERIAL CAN WEAKEN THE FCL METERING PANEL. R R R (i) Take a swab from the surface of the polished area using a fine grade emery paper. Preserve this paper and send it to your Rolls-Royce representative. Avoid contamination of this paper. R R R
NOTE : The emery paper will be used for spectroscopic analysis if the inspection shows that the panel is made from N75 material. R R R (q) If the readings are ambiguous (i.e. it cannot be determined whether the metering panel is made from N75 or C263), contact your local Rolls-Royce office. (6) If the alloy sorter reading shows that FCL metering panel is N75 do these steps: (a) If this NMSB is accomplished at shop visit, the FCL assembly must be replaced with a FCL that conforms with this NMSB or NMSB 72-AF572 before the engine is returned to service. (b) If this NMSB is accomplished on-wing, inspect the FCL metering panel for signs of cracking in accordance with AMM 72-00-00/601 - Inspection of the Combustion Liners and HPNGV. NTO529 gives advice with respect to signs of FCL metering panel cracking and distortion. Reject if the damage is outside of acceptable limits given in the AMM - the FCL assembly must be replaced with a FCL that conforms to this NMSB or NMSB 72-AF572 before the engine is returned to service. (c) If this NMSB is accomplished on-wing and the FCL metering panel conforms to AMM acceptance limits, then await Rolls-Royce findings from R R the emery paper sample. Do not exceed the fly-on limits in 3.C (6)(c)(ii). R R (i) If Rolls-Royce confirms that the material id C263 (False Positive), then the Engine should be accepted and no further action is required. R R R (ii) If Rolls-Royce confirms that the material is N75, then the complete FCL assembly must be removed and replaced with a FCL that conforms to this NMSB or NMSB72-AF572 within the number of flights specified below: R R R R**Printed in Great Britain**



# RB.211−72−AG183 Page 14 Dec 17/09 R Dec. 6/12FCL meter panel total cycles since new (TCSN) R R Fly-on limit

< 3,000 cycles R 400 cycles 3,000 - 7,000 cycles R 100 cycles > 7,000 cycles R 50 cycles
NOTE : Section 1.D. Compliance gives details on how you can determine that the replacement FCL uses a metering panel in C263 material. (d) If the TCSN of the FCL metering panel cannot be determined, use the engine TCSN. (e) Once the inspection is complete, refit the removed FSN in position 7 in accordance with AMM 73-11-05/401 Install the Fuel Spray Nozzle (FSN) or EM TASK 72-00-41-020-022, Install the Fuel Spray Nozzle. (f) Use the internal inspection equipment to make sure that the FSN is correctly installed AMM 72-00-00/601 Inspection of the Combustion Liners and HPNGV or EM TASK 72-41-13-200-000, Inspect Front Combustion Liner Assembly. (g) If the NMSB is accomplished on-wing, return the aircraft to its usual condition in accordance with AMM 72-00-00/601 (Put the Airplane Back in its Usual Condition). (h) Do Test No. 2 - Fuel and Oil Leak (AMM Task 71-00-00/501 or EM task 72-00-00-700-006). (i) Do test No. 13 - Take-off Power (AMM Task 71-00-00/501) or Test No.5 - Running-in (EM task 72-00-00-700-009). D. Accomplishment of this Non-Modification Service Bulletin is to be recorded in the engine logbook.**Printed in Great Britain**



# RB.211−72−AG183 Page 15 Dec 17/09 R Dec. 6/12View from the rear of the Engine showing Inspection access at FSN position 7. Fig. 1**Printed in Great Britain**



# RB.211−72−AG183 Page 16 Dec 17/09 R Dec. 6/12Polished Metering Panel Fig. 2**Printed in Great Britain**



# RB.211−72−AG183 Page 17 Dec 17/09 R Dec. 6/12View of Inserted Alloy Sorter Probe at Fuel Spray Nozzle position 7 - Walker Scientific Inc. ATS-6044T - Alloy Sorter Fig.3**Printed in Great Britain**



# RB.211−72−AG183 Page 18 Dec 17/09 R Dec. 6/12View of Inserted Probe at Fuel Spray Nozzle Position 7 - Koslow Scientific Company TE-3000 Thermoelectric Alloy Sorter Fig.4**Printed in Great Britain**



# RB.211−72−AG183 Page 19 Dec 17/09 R Dec. 6/12Close up View of Probes positioned on Polished portion of Metering Panel Fig. 5**Printed in Great Britain**



# RB.211−72−AG183 Page 20 Dec 17/09 R Dec. 6/12Record of achievement

1. This Form is to be completed in accordance with Accomplishment Instructions (3.B.). 2. Results to be sent to Rolls-Royce via your local representative. APPENDIX 1**Printed in Great Britain**



# RB.211−72−AG183 Appendix 1 - Page 1 of 2 Dec 17/09 R Dec. 6/12Record of achievement - Walker Scientific Inc. ATS-6044T - Alloy Sorter**Printed in Great Britain**



# RB.211−72−AG183 Appendix 1 - Page 2 Dec 17/09 R Dec. 6/12Record of achievement - Koslow Scientific Company TE-3000 thermoelectric alloy sorter

1. This Form is to be completed in accordance with Accomplishment Instructions (3.C.). 2. Results to be sent to Rolls-Royce via your local representative. APPENDIX 2**Printed in Great Britain**



# RB.211−72−AG183 Appendix 2 - Page 1 of 2 Dec 17/09 R Dec. 6/12Record of achievement - Koslow Scientific Company TE-3000 Thermoelectric Alloy Sorter**Printed in Great Britain**



# RB.211−72−AG183 Appendix 2 - Page 2 Dec 17/09 R Dec. 6/12