737NG-26-1 右翼身过热灯亮.doc

A/C NO. 机 号Editor/Date 编写/日期Checked By/Date 审核/日期Approved By/Date 批准/日期Card No.工单编号2010-09-06/2010-10-11737NG-26-1Skill 专业INSP. 必检Revision 版次Effectivity 适用飞机MEYES01737NGTitle 标题右翼身过热灯亮一 故障信息解释 翼身过热灯亮表明过热控制组件M237探测到了过热、探测线故障或者探测线和控制组件之间线路故障。The fault occur when the control module, M237 detects a overheat, or a fault with a detector, or the wiring between a detector and the control module.二 故障现象 1、故障发生的阶段：地面 起飞 爬升 巡航 下降 进近 落地 2、TLB故障记录： 3、故障代码： 4、其它现象：三可能的故障原因 1、过热探测线 Fire Detector Element2、过热探测组件 Control Module, M237.3、线路 Wiring. 4、管道渗漏 Duct Leak四 风险评估和相关维修提示 不能用直流欧姆表或万用表测量探测线电阻，这可能导致测量结果不正确。Do not use a dc ohmmeter or a multimeter for resistance checks on the sensor loops in the overheat detection system. The sensor level settings can move to a higher value. This can cause an overheat condition that will not be detected.五参考手册FIM26-18-00 Wheel Well Fire, Wing and Body Overheat Detection - Fault IsolationSSM26-12-11 Wheel Well Fire, Wing and Body Overheat Detection六特殊工具设备LCR meter (Inductance, Capacitance, Resistance), COM-1741 refers to the 875B, 878, 878A, or 879 models of LCR meter. The LCR meter must have amaximum test voltage of 1 volt rms.七排故工作步骤JOB DESCRIPTION 工 作 内 容RESULT数据结果WORKER工作者INSP.检查者A、排故准备 1、飞机上电。 Electrical power is on airplane. 2、确保下列跳开关闭合。 Make sure that these CBs are closed.P6-2 A19 FIRE PROTECTION DETECTION OVHT WW WING BODYP6-2 A21 FIRE PROTECTION DETECTION MASTER WARN &CONTP6-3 C13 MASTER CAUTION ANNUNCIATOR CONT 3B、排故步骤 FAULT ISOLATION PROCEDURE 1、进行过热探测组件自检，读取故障代码。 Do the overheat detection control module BITE procedure, read the fault code. 2、如果出现以下故障代码，则更换探测组件。(AMM26-18-01) If these codes occur, then replace the overheat detection control module.00 - CONTROL OR POWER SUPPLY FAILURE01, 02 - 115VAC OR POWER SUPPLY CARD FAILURE03, 04, 05 - CONTROL CARD FAILURE98 - LOCAL TEST - NOT COMPLETE 3、如果出现下列代码，则进行相应可能故障区域检查。 If these codes occur, then check the possible zone in this table.CODEFAULT DESCRIPTIONPOSSIBLE BAD DETECTORS10LEFT WING LEADING EDGE SHORTM268,M370,M1761, M176212LEFT WING LEADING EDGE OPENLOOPM268, M370, M1761, M176214LEFT WING LEADING EDGEALARMM268, M370, M1761, M176220LEFT A/C PACK SHORTM355, M1909, M191122LEFT A/C PACK OPEN LOOPM355, M1909, M191124LEFT A/C PACK ALARMM355, M1909, M191130KEEL BEAM SHORTM272, M27332KEEL BEAM OPEN LOOPM272, M27334KEEL BEAM ALARMM272, M27340AFT CARGO SECTION SHORTM275, M276, M347, M348, M114742AFT CARGO SECTION OPENLOOPM275, M276, M347, M348, M114744AFT CARGO SECTION ALARMM275, M276, M347, M348, M114760RIGHT WING LEADING EDGE ORRIGHT A/C PACK SHORTM269,M356,M371,M176, M1764,M1910, M191262RIGHT WING LEADING EDGE ORRIGHT A/C PACK OPEN LOOPM269,M356,M371,M176, M1764,M1910, M191264RIGHT WING LEADING EDGE ORRIGHT A/C PACK ALARMM269,M356,M371,M176, M1764,M1910, M191284WHEEL WELL FIRE ALARMM270 a.检查故障代码所指示的区域是否有热气体渗漏。如果发现热源，则修复渗漏处。 Examine the zone identified in the maintenance message for hot air. If hot source is found, then repair the leakage. b.如果未发现渗漏，则进行下一步。 If no hot source is found, then continue. 4、检查故障代码所示探测回路和相关线路。 Examine the fire detector loop identified in the maintenance message, and the related wiring. a.从回路两端测量探测回路连续性。 Do a check for continuity between the terminal lugs at each end of the loop.b.用LCR表，设置频率为120Hz，分段测量该回路中探测线对壳体电阻不小于50,000欧姆。 Use LCR meter, set the frequency to 120Hz. Make sure the resistance is at least 50,000 ohms between the center connector and structure ground. c.如果测量结果不正常，则更换相应探测线。(AMM26-18-02) If there is a problem with an element, replace the element. d. 仔细检查该回路中的线束，如发现损伤，修复线路。Examine the related wiring. If there is an obvious problem with the wiring, then repair the wiring. 5、如探测线和线路正常，则更换过热探测控制组件。(AMM26-18-01) If the elements and wiring are