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This document transmits the Initial Issue of Service Bulletin TRENT XWB 72-AL165 Bulletin Initial Issue Remove Incorporate Reason for change Pages 1 to 20 of the Service Bulletin Initial Issue P.O. Box 31, Derby DE24 8BJ, UK Tel: +44 (0) 1332 242424 This Rolls-Royce Technical Publication is subject to export control as follows:
Jurisdiction: UK Export Classification: PL9009c The technical information contained in this document has been approved under the authority of - See Planning Information, Approval.
Date: September 05, 2024
TRENT XWB SERIES PROPULSION SYSTEMS NON-MODIFICATION SERVICE BULLETIN ALERT TRENT XWB 72−AL165 Transmittal - Page 1 of 2
CHECK THAT ALL PREVIOUS TRANSMITTALS HAVE BEEN INCORPORATED If any have not been received please advise customersupport@rolls-royce.com.
© 2024 Rolls-Royce plc
P U B L I C A T I O N T R A N S M I T T A L ALERT
LIST OF EFFECTIVE PAGES The effective pages to this Service Bulletin are as follows:
Page Revision Number Revision Date Bulletin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 Sep. 5/2024 ALERT TRENT XWB 72−AL165 Transmittal - Page 2 of 2
ENGINE - FUEL MANIFOLD - ONE TIME INSPECTION OF THE MAIN FUEL HOSE ASSEMBLY - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.72-AL165
1. Planning Information A. Effectivity Airbus A350 All TRENT XWB-97 Engines, except Engine Serial Number 26023, 26024, 26025, 26026, 26029, 26033, 26035, 26036, 26039, 26040, 26041, 26042, 26043, 26047, 26048, 26052, 26053, 26058, 26059, 26061, 26062, 26069, 26070, 26104, 26114, 26132, 26133, 26142, 26156, 26206, 26207, 26212, 26213, 26250.
B. Reason
(1) Problem Following an in-flight shutdown on a Trent XWB-97 engine this Non-Modification Service Bulletin (NMSB) introduces an initial inspection of the fuel manifold main fuel hose assembly.
(2) Safety Intent The safety intent of this NMSB is to identify and remove damaged fuel manifold main fuel hose assemblies from service which, if not accomplished, could lead to a fuel leak and a subsequent in-flight event.
C. Description This NMSB is issued to instruct a one-off visual and dimensional inspection of the Trent XWB engine of the fuel manifold main fuel hose assembly for damage. The NMSB includes specific inspection tasks and accept / reject limits.
Accomplishment of this NMSB should be recorded in accordance with local NMSB tracking procedures.
The feedback sheet in Appendix 1 (or similar form) should be completed and returned to your Rolls-Royce Airline Support Team (AST) upon completion of the Accomplishment Instructions and a copy emailed to TrentXWB_ServiceEngineering@Rolls-Royce.com (Trent XWB Service Engineering inbox). The text ’NMSB 72-AL165 must be included in the subject line of the return email.
D. Compliance
(1) On-Wing ALERT ALERT TRENT XWB 72−AL165 Page 1 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
(a) On-wing installed engines, carry out accomplishment instructions in Section 3.A no later than the Compliance Time defined in Table 1.
Group Engine Criteria Compliance Time 1 Engines with Hours Since New greater than or equal to 18,500 that have had 2 or more previous shop visits (Hospital, Check & Repair, Refurbishment or Overhaul) OR Engines with Cycle Since New greater than or equal to 2,300 that have had 2 or more previous shop visits (Hospital, Check & Repair, Refurbishment or Overhaul) 3 days from date of Issue of NMSB 2 Engines which are not in group 1, which have had a previous shop visit (Hospital, Check & Repair, Refurbishment or Overhaul) 7 days from date of Issue of NMSB 3 Engines not in group 1 or group 2 30 days from date of Issue of NMSB Table 1: Required Compliance Time
(b) Engines which are not installed on aircraft, carry out accomplishment instructions in Section 3.A prior to installation.
(2) In-Shop Not Applicable.
E. Approval NMSB 72-AL165 was approved by Rolls-Royce on Sep. 5/2024. The technical content of this document is approved under the authority of the DOA ref. EASA.21J.065.
F. Manpower
(1) On-Wing
(a) Time to gain access
0.25 man-hours (1 person x 0.25 hours) - (Estimated).
(b) Time to inspect 2 man-hours (1 person x 2 hours) - (Estimated).
(c) Time to restore to serviceable condition
0.25 man-hours (1 persons x 0.25 hour(s)) - (Estimated).
(2) In-Shop Not Applicable.
NOTE: The parts affected by this NMSB are accessible On-Wing.
ALERT TRENT XWB 72−AL165 Page 2 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
G. Material Price and Availability Prices available on request.
H. Tooling Price and Availability Tooling required to accomplish this Non-Modification Service Bulletin if fuel manifold main fuel hose assembly is found to be damaged:
(1) Vernier gauge (No specific) - 1 off.
(2) HU38837 Plier - 1 off.
(3) RRT028932 Crimping Plier - 1 off.
(4) RRT102260 Immobiliser - 1 off.
(5) RRT102591 Immobiliser Kit - 1 off.
(6) RRT071379-1 Spanner - 1 off.
(7) RRT071380-1 Spanner - 1 off.
(8) RRT102261 Immobiliser - 1 off.
(9) RRT102262 Immobiliser - 1 off.
(10) RRT102263 Immobiliser - 1 off.
(11) RRT102259 Immobiliser - 1 off.
(12) RRT102258 Immobiliser - 1 off.
(13) RRT102257 Immobiliser - 1 off.
(14) RRT102256 Immobiliser - 1 off.
(15) Access platform 3M (10 FT) - Adjustable - 2 off.
(16) Torque wrench range to between 4.52 and 4.98 m.daN (33.34 and 36.73 lbf.ft) - As required.
(17) Torque wrench range to between 3.49 and 3.85 m.daN (25.74 and 28.40 lbf.ft) - As required.
I. References
(1) Maintenance Procedures (MP):
(a) A350-A-71-XX-XX-06001-398A-A - List of Power-Plant Maintenance Practices.
(b) A350-A-72-41-65-00001-520A-A - Removal of the Main Fuel Hose-Assembly from the Fuel Manifold.
(c) A350-A-72-41-65-00001-720A-A - Installation of the Main Fuel Hose-Assembly on the Fuel Manifold.
ALERT TRENT XWB 72−AL165 Page 3 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
2. Material Information A. Parts that may be required to accomplish this NMSB.
72-41-71, refer to Engine Illustrated Parts Catalogue FIG ITEM NO. QTY PART TITLE PART NO.
01 192 10 O ring packing M83485-1-112 01 195 10 Washer FK11864 01 392 10 O ring packing M83485-1-112 01 395 10 Washer FK11864 02 250 6 RH-MAIN FUEL HOSE PH11181-2CLS 02 265 1 RH-MAIN FUEL HOSE PH11179-2CLS 02 280 2 RH-MAIN FUEL HOSE PH11180-2CLS 02 295 1 RH-MAIN FUEL HOSE PH11182-2CLS 02 500 6 LH-MAIN FUEL HOSE PH11176-2CLS 02 515 2 LH-MAIN FUEL HOSE PH11177-2CLS 02 530 1 LH-MAIN FUEL HOSE PH11178-2CLS 02 545 1 LH-MAIN FUEL HOSE PH11183-2CLS 72-41-72, refer to Engine Illustrated Parts Catalogue FIG ITEM NO. QTY PART TITLE PART NO.
01 178 18 O ring packing M83485-1-110 01 198 2 O ring packing M83485-1-110 01 240 20 Sealing ring M83485-1-114 01 285 20 Washer UP10274 B. Consumable items required to accomplish this NMSB if fuel manifold main fuel hose assembly is found to be damaged:
Reference QTY Designation OMat 2-142 As required Safety cable ALERT TRENT XWB 72−AL165 Page 4 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
3. Accomplishment Instructions
GENERAL NOTE: When the words “refer to” are used in the Accomplishment Instructions and there are other acceptable methods, techniques and practices (including tools, equipment and test equipment) those acceptable methods, techniques and practices (including tools, equipment and test equipment) can be used to complete the work, however Rolls-Royce plc always recommends to use the procedures referred to in the Accomplishment Instructions. When the words “in accordance with ” are used in the Accomplishment Instructions, the methods, techniques and practices (including tools, equipment and test equipment) in the specified document must be used.
A. On-Wing - Visual and dimensional inspection of the fuel manifold main fuel hose assembly.
WARNING: YOU MUST BE CAREFUL WHEN YOU WORK ON THE ENGINE AFTER THE ENGINE IS SHUTDOWN. THE ENGINE CAN STAY HOT FOR ALMOST ONE HOUR.
WARNING: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE INJURY. IF YOU GET AN INJURY, PUT IT IN COLD WATER FOR 10 MINUTES.
THEN GET MEDICAL AID.
WARNING: YOU MUST NOT LET ENGINE FUEL STAY ON YOUR SKIN. FLUSH THE FUEL FROM YOUR SKIN WITH WATER. THE FUEL IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY.
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
CAUTION: YOU MUST NOT LET ENGINE FUEL FALL ON THE ENGINE. UNWANTED FUEL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT-FREE CLOTH. THE FUEL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
CAUTION: YOU MUST NOT PUT FUEL THAT HAS BEEN DRAINED FROM THE ENGINE BACK INTO THE FUEL SYSTEM. CONTAMINATION IN THE FUEL CAN CAUSE DAMAGE TO SOME PARTS.
CAUTION: YOU MUST NOT BEND THE FLEXIBLE HOSE SECTIONS OF THE FUEL MANIFOLD ASSEMBLY TOO MUCH WHEN YOU DISCONNECT/CONNECT THEM. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE FUEL MANIFOLD ASSEMBLY CAN OCCUR.
CAUTION: IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN FLIGHT
SHUTDOWN, POWER LOSS OR OTHER ANOMALIES 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 engine to gain access to visually inspect the main fuel hose. Refer to A350-A-72-41-65-00001-520A-A Section 3.
ALERT TRENT XWB 72−AL165 Page 5 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
(2) Inspection of the fuel manifold main fuel hose 1 to 20.
(a) Apply pressure to the middle third of the free hose length, perpendicular to the bend in the installed condition, using thumb and forefinger, refer to Figure 1 and Figure 2.
[1] If any softness, compliance or lack of resistance is identified proceed to 2 (b).
[2] If the above criteria is not met proceed to 2 (c).
(b) Do a dimensional inspection of the middle third of the free hose length, perpendicular to the bend in the installed condition, with vernier gauge (no specific), refer to Figure 1, Figure 2, Figure 3 and Figure 4.
CAUTION: YOU MUST NOT PUT TOO MUCH PRESSURE ON THE TUBE WHEN USING VERNIER GAUGE, IF YOU DO NOT OBEY DAMAGE TO TUBE MAY OCCUR.
[1] Firmly push the vernier gauge (no specific) by hand, to compress the outer braid and measure and record the reading in Appendix 1 Table 2 or similar form.
[2] If the vernier gauge measurement is more than 12.0 mm (0.47 in.) accept the hose, and proceed to Step (c).
[3] If the vernier gauge measurement is less than or equal to 12.0 mm (0.47 in.), replace the hose in accordance with 3.A.(3) within 10 flight cycles, and proceed to Step (c).
(c) Do a visual inspection of the full length of the fuel hoses for damage.
[1] Examine the fuel hose braid for cracking.
[a] If no braid cracks are found, proceed to (c)[2].
[b] Reject the main fuel hose if cracks are found. Replace before next flight.
[2] Examine the fuel hoses for chafing.
[a] If there are no signs of chafing or if the chafing does not expose the white e-glass insulator, proceed to (c)[3].
[b] Reject the main fuel hose if the white e-glass insulator is exposed. Replace before next flight.
[3] Examine the fuel hoses for dents.
[a] If dents are less than 2.54 mm (0.10 in.) in depth, proceed to (c)[4].
[b] Reject the main fuel hose if dents are found above 2.54 mm (0.10 in.) in depth.
Replace before next flight.
[4] Examine the fuel hoses for kinks, refer to Figure 5.
NOTE: Kinks are bent deformations of the tube assembly that do not agree with the circular tube contour when new. Kinks could decrease and/or stop the flow of fluid through the tube.
[a] If no kinks are found, proceed to (c)[5].
[b] Reject the main fuel hose if kinks are found. Replace before next flight.
ALERT TRENT XWB 72−AL165 Page 6 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
[5] Examine the fuel tubes for Necking, refer to Figure 6.
NOTE: Necking occurs when the tube assembly is stretched and its diameter is less than it was when the part was new. Necking occurs around the entire 360 degrees circumference of the braid.
[a] If no Necking is found, proceed to (c)[6].
[b] Reject the main fuel hose if necking is found. Replace before next flight.
[6] Examine the braid wire of the hoses, refer Figure 7 to Figure 11.
[a] If there are signs of local necking or long insulation strands that have come out from the outer braid, reject the main fuel hose. Replace before next flight.
[b] Bent wire that goes across more than three adjacent wire plaits, reject the main fuel hose. Replace before next flight.
[c] Any broken wire, reject the main fuel hose. Replace before next flight.
[d] Collar area around the crimp zone is embedded in to braid, reject the main fuel hose. Replace before next flight.
(3) If the main fuel hose is rejected, remove the damaged main fuel hose and install a new main fuel hose.
CAUTION: MAKE SURE THAT ONLY THE TOOLING SPECIFIED IN THE MAINTENANCE TASKS ARE USED FOR REMOVAL AND INSTALLATION.
(a) Remove the main fuel hose from the fuel manifold, refer to A350-A-72-41-65-00001-520A-A.
(b) Install a new main fuel hose on the fuel manifold, refer to A350-A-72-41-65-00001-720A-A.
(c) Do the applicable test Ref. MP A350-A-71-XX-XX-06001-398A-A.
(4) Close the access and return engine and aircraft back to initial configuration. Refer to A350-A-72-41-65-00001-720A-A Section 5.
(5) Record accomplishment of this NMSB in accordance with local Service Bulletin tracking system procedures.
ALERT TRENT XWB 72−AL165 Page 7 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
dex8000665 A
VIEW WHEN YOU LOOK FROM THE REAR OF THE ENGINE 1 2 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 A 1 22019 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 General Arrangement of Fuel Manifold Main Fuel Hose Figure 1 ALERT TRENT XWB 72−AL165 Page 8 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
FUEL MANIFOLD
MAIN FUEL HOSE PH11181−2CLS 72−41−71 02−250 PH11179−2CLS 72−41−71 02−265 PH11180−2CLS 72−41−71 02−280 PH11182−2CLS 72−41−71 02−295 PH11176−2CLS 72−41−71 02−500 PH11177−2CLS 72−41−71 02−515 PH11178−2CLS 72−41−71 02−530 PH11183−2CLS 72−41−71 02−545 dex8000666
FUEL MANIFOLD
MAIN FUEL HOSE PH11181−2CLS 72−41−71 02−250 PH11179−2CLS 72−41−71 02−265 PH11180−2CLS 72−41−71 02−280 PH11182−2CLS 72−41−71 02−295 PH11176−2CLS 72−41−71 02−500 PH11177−2CLS 72−41−71 02−515 PH11178−2CLS 72−41−71 02−530 PH11183−2CLS 72−41−71 02−545 Fuel Hose Dimensional Inspection Figure 2 ALERT TRENT XWB 72−AL165 Page 9 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc
dex8000667 Example for Dimensional Inspection Accept Figure 3 ALERT TRENT XWB 72−AL165 Page 10 of 20 Sep. 5/2024, Initial Issue © 2024 Rolls-Royce plc