Blog

月度归档： 2021 年 3 月

驾驶杆操作力轻

自有案例，走了弯路。

在询问时，注意问清楚是驾驶盘左右操作力还是驾驶杆俯仰拉力，在副翼和升降舵均感觉定中机构均有定中弹簧，提供力反馈。这两个弹簧断裂的案例都极少。在自动驾驶时，由于机组不操作，没有感觉。通常在近进脱开自动驾驶后，由于此时速度小高度低，对机组的操作是存在相当的影响的，需及时排除。

无引气起飞重接引气导致DEU信息框闪亮

有飞机执行无引气起飞，APU关引气后，右发接引气时DEU上右发START VALVE OPEN/OIL FILTER BYPASS/LOW OIL PRESSURE三个机组警告牌一起闪亮一下后均熄灭。自检EEC无信息，滑油滤旁通电门位置正常。这种情况一般是由于活门有少量漏气，导致重新通气过程中，碟片摆动所致。译码能较为明确的识别和发现。

混合总管上余水管接头断裂

齐根断裂，怀疑是撞断的。用于收集混合总管的冷凝水。波音提供可临时修复的方案。包括接头重做和更换余水组件。

190158074A-Attachment-1下载
190158074A-Attachment-2下载

For a permanent repair of the damaged tube, Boeing recommends removing and replacing the damaged 65C33447-4 drain manifold.      

a. Separating parts bonded together using SOPM 20-50-12, Type 70 cured at room temperature can be challenging.  Boeing recommends to heat the bondline with a heat gun to 225 – 250F.  While heating gently exert pressure to pry apart using a plastic wedge or other soft tool.  Do not heat the part, allow part to cool and then reheat.  This will post cure the adhesive and make successful removal more difficult.  Upon removal from the assembly remove all residual adhesive from the bond area of each detail part. 

b. Lightly abrade faying surfaces with 180-grit or finer paper in accordance with SOPM 20-30-03, until gloss and any contaminants are removed. Use only new clean sandpaper for abrading. 

c. Clean in accordance with the Final Cleaning section of SOPM 20-30-03.  Wipe clean with a dry wiper.

d. Bond new 65C33447-4 drain manifold per SOPM 50-20-12 Type 70.  Ensure the drain tube hole is not filled with adhesive and fully exposed inside the drain manifold to allow the proper drainage.

As a temporary solution for 10 FC, the broken tube can be installed in place and bonded to the the mix manifold drain assy with RTV157 sealant provided no leak from the sealed area.

[ Back To Top ]