Mixer Flap Actuator Fault

你好罗先生

跳了一个 Mixer Flap Actuator Fault，航后更换20HB后第二天还是跳了一次相同故障，晚上检查20HB的安装方向都是对的，根据TSM排故都没问题了。请问大神们，为啥换了过后还要跳故障，还有20HB这个有什么用啊，手册看了没看懂。在线等待各位支招
Mixer Flap Actuator （20HB）The mixer flap actuator 20HB operates a flap in the cockpit supply port of the mixer. A thermally protected 28 V DC motor drives the back-up flap through a reduction gearbox. Microswitches inside the mixer flap actuator 20HB prevent override of the flap at each end of its travel. A manual override lever and position indicator (on top of the actuator) make it possible to operate the flap manually.

lpher

D. Mixer Flap Actuator
The mixer flap actuator 20HB operates a flap in the cockpit supply port of the mixer. The flap connects the cockpit supply duct to the pack 1 mixer chamber, when both packs are in operation. When pack 1 is switched off, the flap changes the position and connects the cockpit supply duct to the pack 2 mixer chamber. This function makes sure of:
· a good flow separation during pack 2 operation,
· the supply of a sufficient fresh air quantity to the cockpit with pack 1 off.
When the flap in the mixer unit enters the airflow it causes a small airflow diversion into the cockpit duct. This results in an adequate supply of conditioned air to the cockpit.

你应该查阅系统功能描述章节，里面有详细说明。至于第二天还出故障，这个真心不好说，也许航材有问题，也许是系统记忆，看后续航段还出现不，或者线路，这就难说了。

你好罗先生

lpher 发表于 2018-10-23 09:51
D. Mixer Flap Actuator
The mixer flap actuator 20HB operates a flap in the cockpit supply port of t ...

后面跟踪了一下，应该是系统记忆。感谢