波音737飞机EEC-BITE航段的定义

HNAT737技术问题说明提示单编号撰写校对批准/旧期T1P737-2021-73-007李政卫符方洲张大伟2021.1.28标题EEC BITE航段的定义一、适用性737NG二、背景描述EEC BITE时，会遇到对于故障航段的判断，交流中发现部分人员认为leg0是指最后一段，如下图所示杭州一深圳段，实则存在一定的理解误差，特做相应的解析。启动发动机关闭发动机深圳杭州杭州绵阳绵阳杭州杭州深圳LEG3-LEG 2.LEG 1.LEG 0.三、解释说明一)，手册定义1,FM手册对于EEC BITE航段的解释，在FM73-O0TASK801中做了说明：Flight leg 1.-3是最近的三个航段。Flight leg0记录的是最后一个航段落地30秒后发生的故障，或者最近的一次地面试车过程中发生的故障。如果在两个航段之间，发动机地面启动关断过不止一次，那个Lg0记录最后一次地面试车时发生的故障。(6)RECENT FAULTS(a)The recent fauits function wll show the maintenance messages for the most recent three night legs and one ground operation.(b)Flight legs 1 through 3 are the three most recent flight legs.(间Flight leg0.1)This fight leg can show maintenance messages that oocur more than 30 seconds after landing from the last fight leg2)This fight leg can show the most recent ground run of the engine.NOTE If the engine is started and stopped more than once between flights.Flight Leg 0 will contain data from the last ground run of the engine(d)The X below the flight leg number indicates the fault ocoumred on that fight leg(e)For fight legs that did not have a fault,the space below the flight legs number is blank.(7)FAULT HISTORY(a)The fault history function will show the maintenance messages for the ten most recent fight legs and one ground operation.(b)The fault displays for RECENT FAULTS and FAULT HISTORY are the same:but.FAULT HISTORY adds data for night legs 4 through 101)Flight leg 1 shows the data for the most recent fight leg.2)Flight leg 10 shows the data for the olest fight leg that is stored in the FAULT HISTORY2,发动机培训手册在CFM56-7B的发动机培训手册还提到了数据记录介质的问题，当发动机转速N2>40%时，EEC将故障记录在NVM(NON VOLATILE MEMORY非易失存储器)，这样即使EEC断电后，故障记录仍然不会消失。当时当发动机转速N2<40%时发生的故障，故障一般记录在RAM1/4