B737NG热交换器更换技巧注意事项.doc

B737NG热交换器更换技巧注意事项（及与300的区别） 前言： AMM手册21-51-03/401给出的是热交换器和ACM作为一个整体更换（原因后面讲解） （It is recommended that you remove the primary heat exchanger, the secondary heat exchanger and the air cycle machine as one unit. You may remove and install a heat exchanger separately if you determine this best suits your maintenance needs. However, this procedure is written to remove and install the heat exchangers and the air cycle machine as a unit.）。 在实践中发现可以不必拆ACM（原因后面讲解），另外要将初级和次级热交换器分开拆和装（原因后面讲解）。 工时预计：5人×3小时。 准备： 工作准备： (a) Set the L and R PACK switches to the OFF position and attach DO-NOT-OPERATE tags. (b) Set the BLEED 1 and 2 switches to the OFF position and attach DO-NOT-OPERATE tags. (c) Set the BLEED APU switch to the OFF position and attach a DO-NOT-OPERATE tag. 航材和消耗材料准备： 名称 图示中编号 件号 出处（IPC） 数量 有效性 备注 GASKET 图3的90 65-49571-21 21-51-03-01A/90 4 NG 使用 GASKET 图3的85 65-49571-22 21-51-03-01A/85 4 NG 使用 ACM GASKET 图10的75 2215108-1 21-51-03-05A/75 1 NG 使用 GASKET 图4的134，395 2215696-1 21-51-03-05A/134，395 2 NG 使用 胶皮粘接剂 RVT103 使用 BOLT 图2的35 BACB30NR4K19 21-51-03-01A/35 4 800,900 备用 BACB30NR4K17 21-51-03-01/35 4 700 备用 BUSHING 图2的65 BACB28AK04-033 21-51-03-01A/65 4 NG 备用 BOLT 图3的15 NAS8703-4 21-51-03-01A/15 16 NG 备用 BOLT 图3的20 NAS6703-6 21-51-03-01A/20 9 800，900 备用 NAS6703-7 21-51-03-01/15 9 700 备用 ROD ASSY 图1的165 213A1020-1 21-51-03-01A/165 1 NG 备用 ROD ASSY 图1的130 213A1020-3 21-51-03-01A/130 3 NG 备用 CLIP ASSY 图4的250 2215712-1 21-51-03-05A/250 2 NG 备用 CLIP ASSY 图4的255 2215712-2 21-51-03-05A/255 2 NG 备用 SCREW 图5的15 BACB30NN3K4 21-51-24-01/15 21 NG 备用 BOLT 图6中未标示 NAS6703-6或BACB30LM3-6 21-51-24-01/155 25 NG 备用 WASHER 图6中未标示 BACW10BP3CD 21-51-24-01/160 25 NG 备用 常用工具： 3/8，7/16，9/19的棘轮至少两个，小红盒2～It is recommended that you remove the primary heat exchanger, the secondary heat exchanger and the air cycle machine as one unit. You may remove and install a heat exchanger separately if you determine this best suits your maintenance needs. However, this procedure is