WOHA33_143518_73_EOCOM-73-0090

Hong Kong Airlines Limited香港航空03110-01Hong Kong Airlines MEDHong Kong Airlines LimitedWO NO/工作指令号SEQ NO/序列号WOHA331435_73_18适航指令(AD) 143518TitleINSPECT LP FUEL TUBES, CLIPS, AND FOHE MOUNTING HARDWARE FOR FRETTAGEMcd&Rev/厂家工卡&修订日期标题低压燃油管/P型夹/FOHE安装座磨损检查A/C/飞机号/组别EO JC No./EO工卡EO JC Rev/工卡版本Workarea/工作区域Skill/工种Man Hour/工时BLNV/NEOCOM-73-0090R08动力/PowerplantAIRP03:00Baseline/依据Operator EO/营运人EOEO Rev/EO版本Work Type/工作类别Threshold/首检Interval/重复检EOCOM-HKG73-0025R074000FH4000FHWritten/编写Reviewed/审核Approved/批准2015-03-262015-03-312015-04-03Accomplished完工签署Complete Date完工日期Station维修站PVGREASON & DESCRIPTION/原因及描述世界Trent700机队曾发现燃油泵和燃滑油热交换器（FOHE）之间的燃油管发 生 燃油泄漏。燃油泄漏的原因：FOHE安装座发生磨损后使FOHE的安装稳固性降低并带动燃油管，使燃油管在P型夹处严重松动，P型夹的胶皮磨损光后暴露出的金属部分进一步磨损燃油管壁，最终造成燃油管破裂和燃油泄漏。此问题会造成燃油大量泄漏、空停和转航。世界机队曾出现多起P形夹CP4881磨破燃油管造成燃 油泄漏的事件（见图11）。为保障飞行安全，保持发动机可靠性，颁发本EO。Low-pressure (LP) fuel leaks from the LP fuel tubes between the combined LP/HP (High Pressure) Fuel Pump and the Fuel/Oil Heat Exchanger (FOHE), and FOHE to LP/HP fuel pump have occurred in-service in the Trent 700 fleet. Movement of the FOHE mounts due to wear allows the fuel tubes to move excessively within the clipping points. This has resulted in excessive wear of the rubber section of the P-Clips, and the subsequent frettage between the exposed metal band and the fuel tubes. The frettage reduces the fuel tube outer wall thickness, leading to fracture of the fuel tube and the consequent fuel leak. This may cause the leakage of significant amounts of fuel and can cause IFSD and diversion events. There has been a fuel leakage event among global fleet due to the frettage between the Clip CP4881 and the fuel tube (ref to Fig. 11). Therefore, this EO is released to maintain flight safety and engine reliability.注释: R01版改版原因与内容：按SB RB.211-73-AH522 R1版修 改EO计划信息和施工步骤。Note：Change and revise reason in this issue R01: As per SB RB.211-73-AH522 R1 revision, change the EO plan information and accomplishment instruction.注释：R02版改版原因与内容：在EO依据文件中增加EASA AD 2014-0089和CAAC CAD2014-A330-03。Note：Change and revise reason in this issue R02: Add EASA AD 2014-0089 and CAAC CAD2014-A330-03 into EO Source Documents.注释: R03版改版原因与内容：增加EO施工步骤和反馈单中P型夹的更换确认信息记录和反馈。Note：Change and revise reason in this issue R03:Add record and feedback confirmation for P clip replacement in EO instruction and feedback form. 注释: R04版改版原因与内容：按SB RB.211-73-AH522 R2修改EO施工步骤中的附图,修改反馈单。Note：Change and revise reason in this issue R04: Change the Figure in EO Accomplishment Instruction in accordance with SB RB.211-73-AH522 R2, change the Technical Feedback Form.注释：R05版改版原因与内容：EASA AD 2014-0089被EASA AD 2014-0243取代, CAAC CAD2014-A330-03被CAAC CAD2014-A330-03R1取代, 据此修改EO依据文件和EO首检等效执行方式。Note：Change and revise reason in this issue R05: Change EO Source Documents and alternative accomplishing methods of EO initial inspection because EASA AD 2014-0089 is superseded by EASA AD 2014-0243 and CAAC CAD2014-A330-03 is superseded by CAAC CAD2014-A330-03R1.注释：R06版改版原因与内容：EASA AD 2014-0243被EASA AD 2014-0243R1取 代, CAAC CAD2014-A330-03R1被CAAC CAD2014-A330-03R2取代, 据此修改EO依据文件。Note：Change and revise reason in this issue R06: Change EO Source Documents because EASA AD 2014-0243 is superseded by EASA AD 2014-0243R1 and CAAC CAD2014-A330-03R1 is superseded by CAAC CAD2014-A330-03R2.注释：R07版改版原因与内容：EASA AD 2014-0243R1被EASA AD 2014-0243R1Correction取 代,据此修改EO依据文件。Note：Change and revise reason in this issue R07:Change EO Source Documents for EASA AD 2014-0243R1 is superseded by EASA AD 2014-0243R1Correction.TOOLS/工具TOOLS NECESSARY/必须工具ITEM项目P/N件号DESCRIPTION名称EQTP类型QTY数量APP适用性Conditions note互换信息及备注TOOLS IF NECESSARY/视情工具ITEM项目P/N件号DESCRIPTION名称EQTP类型QTY数量APP适用性Conditions note互换信息及备注PARTS AND MATERIAL/航材NOTE:OPERATOR MUST GET AND INSTALL THE PARTS THAT CORRESPOND TO THE RELATIVE WORKORDER NO.注释：请工作者严格按照工作指令号领取预定的航材装机PARTS AND MATERIAL NECESSARY/必须航材ITEM项目P/N件号DESCRIPTION名称EQTP类型QTY数量APP适用性Conditions note互换信息及备注1AS62424CLIPAS3ALL必备器材Required2FK10140BRACKETASSY OF FCOC MOUNTING - LOWERAS1ALL视情A/R3FK19290STRUTASSY FOHE SUPPORT-FRONTAS1ALL视情A/RPARTS AND MATERIALIF NECESSARY/视情航材ITEM项目P/N件号DESCRIPTION名称EQTP类型QTY数量APP适用性Conditions note互换信息及备注1AS43013-127RING SEALING TOROIDALAS1ALL视情A/R2AS43013-134(33A2)RING SEALING TOROIDALAS1ALL视情A/R3FK19265LINK ASSY FOHE SUPPORT-LOWERAS1ALL视情A/R4FK19266LINK ASSY FOHE SUPPORT-UPPERAS1ALL视情A/R5OMAT1/257CLEANERCH1ALL视情A/R6PL32Ljointing compoundCH1ALL视情A/R (MSRR 9055)7FK10129BRACKETASSY OF FCOC MOUNTING-UPPERAS1ALL视情A/R8FK10141BRACKETASSY OF FCOC SUPPORT STRUTAS1ALL视情A/R9FK11164BRACKETASSY FCOC BRACE MOUNTINGAS1ALL视情A/R10FK11165BRACKETASSY FCOC FORWARD MOUNTINGAS1ALL视情11FK19264STRUTASSY FOHE SUPPORT-LOWERAS1ALL视情A/R12FK19924PLATEASSY FCOC SUPPORTAS1ALL视情A/R13FW53576TUBEASSY FUEL-FCOC TO LINE DISCONNAS1ALL视情A/RPARTS INFORMATION/部件信息:NOTE: The component in PN,SN form is need to do periodic maintenance. For the return repair or retrofit，the form is PN,SN of the removed component. And the PN-IN,SN-IN would be written according to new parts after finish. For the non- returns(such as weight, test)，the form is PN,SN of the on-wing maintenance component. And fill the PN-IN,SN-IN with bias after finish.注释：件号、序号栏指需要定期执行维修工作的部件。对于要求更换拆下返厂工作的部件，该栏指拆下件、序号信息。完成工作后装上件号和序号栏请填写相关装机件信息；对于在位执行工作的（如称重、测试等），该栏指在位工作部件件、序号信息，完成工作后装上件号和序号请用斜线画去。PN/件号SN/序号ATA/章节ZONE/区域FIN/代码LOCATION/装机位置TRENT772B-60/164202372410A3300002LH ENGINEPN-IN装上件号SN-IN装上序号REMOVAL REASON AND COMPONENT TASK REQUEST拆件原因及其部件工作要求TASK NOTE工作注释IMPORTANT NOTE:In the event of any discrepancies between the Chinese instruction and the English instruction, the English procedure should prevail.Record Additional Work/Findings(If Applicable) Reference No. Certificate of Release to Service (* Tick as appropriate # Different crews should perform the work on each of the systems)Certifies that the work specified, except as otherwise specified, was carried out in accordance with HKAR-145and in respect to that work, The aircraft / aircraft components are considered ready for Release to Service. HKA Approval No: AI / 135 / 706 * HNAT Approval No.: JMM 076, D3039 * HNAT Approval No.: JMM 047, D101115* HNAT Approval No.: JMM 049, D500023 * CASL Approval No: AI / 101 / 798 * TAECO Approval No.: DAI / 89 / 1295 * HAECO Approval No: DAI / 1 / 853 * SIAEC Approval No: AWI / 01 * STARCO Approval No.: JMM 039, D.200078 * SMECO Approval No: JMM 081, D.400009 * AMECO Approval No.: JMM001,D101131* Other: * Signature:_ Authorization No.:_ Date:_工卡Job card:EOCOM-73-0090TITLEINSPECT LP FUEL TUBES, CLIPS, AND FOHE MOUNTING HARDWARE FOR FRETTAGEPerfInsp标题低压燃油管/P型夹/FOHE安装座磨损检查工作者检查者警 告：在发动机关车后进行发动机部件的维护工作必须小心烫伤。发动机部件的余热会保持将近1小时。WARNING: YOU MUST BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE IS SHUTDOWN. THE ENGINE PARTS CAN STAY HOT FOR ALMOST 1 HOUR.警 告：不戴劳保手套不能接触发动机未冷却部件，否则会造成烫伤。若发生烫伤，将烫伤部位浸在凉水中10分钟，然后寻求医疗救治。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.警 告：燃油有毒性并可被人体皮肤吸收。人体皮肤不能长时间接触燃油，若皮肤沾染燃油应及时用清水洗净。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.注 意: 为减小由于维护不当所造成的双发同时空停、失去动力或工作异常的风险，特建议工作者不要在同一时段内对同一架飞机的两台发动机进行维护工作，若上述情况无法避免，应采取相应的控制措施以保证工作者严格按照此EO的要求来完成维护工作。CAUTION: IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN-FLIGHT SHUT DOWN, POWER LOSS, OR OTHER ANOMALY DUE TO MAINTENANCE ERROR, IT IS RECOMMENDED 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, IT IS RECOMMENDED THAT ADDITIONAL CONTROLS ARE APPLIED IN ORDER TO ENSURE THAT MAINTENANCE TASKS HAVE BEEN COMPLETED AS DEFINED IN THIS EO.注 意：不能让燃油溅落至发动机上，燃油会对发动机表面保护层和部分发动机部件造成损伤，若发生燃油溅落应立即用干净不起毛的布进行清洁。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.施工说明概述：本工卡要求检查P型夹处的燃油管（P/N: FW53576，从FOHE至高压燃油泵的燃油管）和FOHE安装座。参考图1至图11。General Instruction: Inspect the fuel tube under the p-clips on the fuel tube (P/N FW53576), FOHE to HP fuel pump. Also inspect the FOHE mounting hardware. Refer to Fig.1 thru Fig.11(1) 接近/Get access (a) 参考AMM 71-13-00，打开风扇整流罩。Open the fan cowl doors; refer to Aircraft Maintenance Manual (AMM) Task 71-13-00. (b) 在位放置合适的工作梯。Put suitable access platform into a safe position. (2) 参考图1、图3、图4和图5，检查P型夹位置CP4881, CP2607和CP2427处燃油管（P/N FW53576，从FOHE至高压燃油泵的燃油管上段）的状况。Visually inspect all clip positions (CP4881, CP2607 and CP2427) on the FOHE to HP fuel pump fuel pipe upper section (P/N FW53576) for damage/wear. Refer to Fig.1, Fig.3, Fig.4 and Fig.5.(a) 拆下P型夹CP4881，按步骤(2)(c)中的标准检查燃油管。Remove clip CP4881 to inspect the fuel tube in accordance with criteria as specified in step (2)(c).(i) 参考图1、图3、图4和图5，P型夹CP4881，CP2607和CP2427位于燃油管FW53576处（从FOHE出口至高压燃油泵进口的燃油管）。Clipping positions CP4881, CP2607 and CP2427 are located on fuel tube FW53576 (FOHE outlet to HP fuel pump inlet). Refer to Fig.1, Fig.3, Fig.4 and Fig.5.(ii) 不装回旧P型夹，每次检查后按AMM 70-12-01更换新的P型夹。P型夹安装信息参考图3、图4和图5。Do not refit this clip, replace with new at each inspection in accordance with Aircraft Maintenance Manual 70-12-01. Refer to Fig.3, Fig.4 and Fig.5 for clipping point details. 螺栓AS48409的磅紧力矩为4.5 Nm (40 lbfin)。The torque value of bolt AS48409 is 4.5 Nm (40 lbfin).(iii) 如果燃油管检查超标，按AMM 70-12-01进行更换。燃油管和P型夹安装信息参考图2、图3、图4和图5。If a fuel tube is rejected, remove and replace it in accordance with Aircraft Maintenance Manual 70-12-01. Refer to Fig.2, Fig.3, Fig.4 and Fig.5 for tube and clipping point details.螺栓BLT5529的磅紧力矩为11.5 Nm (100 lbfin)。The torque value of bolt BLT5529 is 11.5 Nm (100 lbfin).螺栓AS48515的磅紧力矩为11.5 Nm (100 lbfin)。The torque value of bolt AS48515 is 11.5 Nm (100 lbfin).(b) 确认完成上一个P型夹的检查，并安装恢复可用后，再拆下下一个P型夹进行检查。Make sure clip and tube are returned to a serviceable condition before moving to the next task.注 释：在拆下P型夹时需检查P型夹是否严重松脱或安装过紧，导致燃油管路位置得不到良好固定或存在过大安装应力。按需拆下周围的P型夹并尽量减小管路的安装应力。并填写反馈表格，记录发现的问题。NOTE: During removal of the clips look for any significant relaxation of strain that suggests poor alignment of the tubes and stressing of certain clipping positions. If necessary loosen adjacent clips and carefully manipulate the tube alignment to minimise any strain in the system. Make a note on the Feedback Form if alignment issues are seen.(c) 请将P型夹的检查更换记录填入下表Please fill below form with the P clips inspection and replacement record.P型夹位置/P Clip PositionCP4881CP2607CP2427P型夹更换记录/P Clip Replacement record (Yes/No)*安装新P型夹GRN或者B/N号/New P Clip GRN or B/N Number(GRN: Record goods release number,B/N: Batch Number)*上述3个位置的P型夹在完成检查后均需要更换为新件。*P clips at above 3 positions must be replaced with new following inspection. (d) 燃油管路检查及报废标准。Fuel tube acceptance and rejection criteria. 管路弯曲处外侧管壁磨损深度超过0.1mm(0.004 in.)。Contact frettage to a depth greater than 0.1 mm (0.004 in.) on the outer surface of a bend on the tube.报废Reject管路其他区域磨损深度超过0.2mm(0.008 in.)。Contact frettage to a depth greater than 0.2 mm (0.008 in.) in any other area of the tube is evident.报废Reject注 释：特别注意检查燃油管所有外露表面，如果某些区域无法直接观察，则需要使用反光镜。NOTE: Take particular care to inspect the entire exposed surface of the tube. A mirror can be used in areas where direct line of sight access is difficult. (e) 参照步骤(2)(a)至(2)(c)和图4，检查P型夹CP2427。Repeat steps (2)(a) to (2)(c) for the clips CP2427. Refer to Fig.4.螺栓AS48408的磅紧力矩为4.5 Nm (40 lbfin)。The torque value of bolt AS48408 is 4.5 Nm (40 lbfin).(f) 参照步骤(2)(a)至(2)(c)和图5，检查P型夹CP2607。Repeat steps (2)(a) to (2)(c) for the clips CP2607. Refer to Fig.5. 螺栓AS48410的磅紧力矩为4.5 Nm (40 lbfin)。The torque value of bolt AS48410 is 4.5 Nm (40 lbfin).(3) 检查FOHE安装座及相关部件，有无明显损伤和超标磨损。参考图6、图7、图8、图9和图10。Inspect all FOHE mounts and associated hardware for signs of obvious damage and excessive wear. Refer to Fig.6, Fig.7, Fig.8, Fig.9 and Fig.10. 注 释：无需拆下FOHE或者断开燃油与滑油管路。可以在位检查FOHE安装座及相关部件。NOTE: It is not necessary to remove the FOHE from the engine or disconnect the oil and fuel tubes. It is acceptable to inspect the FOHE mounts and associated hardware when the FOHE is installed on the engine. 注 释：1次可拆下、检查和更换1个FOHE安装座/连杆/支架。NOTE: The FOHE mounts / links / brackets can be removed, inspected and replaced one at a time.注 释：本检查的目的是为了确认FOHE安装座中的球面轴承是否存在明显间隙，大多数情况下无需离位检查，只需手动晃动FOHE和安装座。若怀疑发生磨损，可拆下连杆/撑杆一端的螺栓并进行更进一步的确认。NOTE: The purpose of this inspection is to identify noticeable play in the spherical bearing of the FOHE mounts. In most cases this can be done without removing hardware, by manipulating the FOHE and mounts. If wear is suspected then remove the bolt at one end of the link/strut for more detailed assessment.(a) 以1次1个的方式检查以下FOHE安装座和相关部件。按需按AMM 79-21-41拆下连杆/撑杆一端的螺栓并按步骤(3)(b)的标准进行手动晃动和目视检查。Inspect the following FOHE mounts and associated hardware one at a time. If required remove the bolt at one end of the link/strut for assessment in accordance with Aircraft Maintenance Manual 79-21-41 and examine by manipulation and visual inspection in accordance with the criteria as specified in step (3)(b).EIPC RefPart No.名称Description79-21-11, 01-280FK10141Bracket, assy of FCOC support strut79-21-11, 01-300FK19290Strut, assy FOHE support Front79-21-11, 01-350FK10129Bracket, assy of FCOC mounting - Upper79-21-11, 01-400FK19924Plate, assy FCOC support79-21-11, 01-500FK19264Strut, assy FOHE support - Lower79-21-11, 01-560FK19265Link, assy FOHE support - Lower79-21-11, 01-580FK19266Link, assy FOHE - Upper72-34-15, 02-330FK11165Bracket, assy FCOC forward mounting72-34-15, 02-340FK11164Bracket, assy FCOC brace mounting72-35-16, 05-480FK10140Bracket, assy FCOC brace mounting注 释：如果在检查期间无法更换受损的零件，可在800FH内进行更换。NOTE: If replacement of damaged parts is not possible during inspection then they can be replaced within 800 flight hours.(b) FOHE安装座检查及报废标准。FOHE mounting hardware acceptance and rejection criteria:项目 Item标准Criteria球面轴承紧但未卡死Bearing tight but not seized接受Accept轻度磨损但无轴承间隙Low friction but no play in bearings接受Accept轻度划痕/刻痕Minor scratches/score marks接受Accept球面轴承存在间隙Play in spherical bearings800FH内更换Replace within 800 flight hours球面轴承卡死Spherical bearings seized800FH内更换Replace within 800 flight hours弯曲或扭曲Bent or twisted800FH内更换Replace within 800 flight hours(4) 参考图8和图10，如果风扇机匣安装支架P/N FK10140、P/N FK11165或P/N FK11164检查超标，按以下步骤进行更换。If fancase mounting bracket P/N FK10140, P/N FK11165 or P/N FK11164 is found to be unserviceable, remove and replace in accordance with the following instructions. Refer to Fig.8 and Fig.10.(a) 支架(P/N FK10140)拆装程序，参考图8。Remove and install the bracket (P/N FK10140). Refer to Fig.8.(i) 拆除将支架安装在安装边FC上的3个螺栓(P/N AS48518)，4个垫片(P/N AS12944)和3个螺母(P/N AS20625)。Remove the three bolts (P/N AS48518), the four washers (P/N AS12944) and the three nuts (P/N AS20625) that attach the bracket to flange FC.(ii) 拆下支架(P/N FK10140)。Remove the bracket (P/N FK10140).(iii) 用3个螺栓(P/N AS48518)，4个垫片(P/N AS12944)和3个螺母(P/N AS20625)将新支架安装在支架(P/N FK14374)和安装边FC上。Attach the new bracket to bracket (P/N FK14374) and the flange FC. Use the three bolts (P/N AS48518), the four washers (P/N AS12944) and the three nuts (P/N AS20625).(iv) 磅紧螺母(P/N AS20625)，磅紧力矩：11.5 Nm (100 lbfin)。Torque the nuts (P/N AS20625) to 11.5 Nm (100 lbfin).(b) 支架(P/N FK11165)拆装程序，参考图10。Remove and install the bracket (P/N FK11165). Refer to Fig.10.(i) 拆除将支架安装在安装边FB上的2个螺栓(P/N BLT5512)和2个垫片(P/N AS12945)。Remove the two bolts (P/N BLT5512) and the two washers (P/N AS12945) that attach the bracket to flange FB.(ii) 拆下支架(P/N FK11165)。Remove the bracket (P/N FK11165).(iii) 用OMat 2/101（干净不起毛的布）和清洁剂（可使用OMat 135 Methyl Ethyl Ketone, OMat 150 Acetone, OMat 1/40 Isopropyl alcohol或OMat 1/257 cleaning solvent）清洁支架安装区域和新支架接合面。Locally clean bracket fitment area and new bracket mating faces using an OMat 2/101 lint free cloth moistened with either OMat 135 Methyl Ethyl Ketone, OMat 150 Acetone, OMat 1/40 Isopropyl alcohol or OMat 1/257 cleaning solvent.(iv) 在支架(P/N FK11165)接合面上施涂接合密封剂MSRR 9055 (Hylomar Grade L)。Apply jointing compound MSRR 9055 (Hylomar Grade L) to the mating face of bracket (P/N FK11165).(v) 使用2个螺栓(P/N BLT5512)和2个垫片(P/N AS12945)将支架安装在安装边FB上。Attach the new bracket to flange FB. Use the two bolts (P/N BLT5512) and the two washers (P/N AS12945).(vi) 磅紧螺栓(P/N BLT5512)，磅紧力矩：24 Nm (210 lbfin)。Torque the bolts (P/N BLT5512) to 24 Nm (210 lbfin).(vii) 清除多余的防咬剂。Remove excess