5 ms·
Looking closely at what they said, it seems like the AOA sensor was automatically making trim inputs which caused the plane to ultimately develop a very nose-do
by AWildC182 8y ago
Looking closely at what they said, it seems like the AOA sensor was automatically making trim inputs which caused the plane to ultimately develop a very nose-down trim condition. Basically a high tech version of a runaway trim control which is why you often see split trim buttons so a switch failure can't cause a runaway.
- PuffinBlue 8y agoYou're right and this point needs to be emphasized. Unless you know how to turn off the Flight Control Computers and the right moment to do so - which may or may not even be in the checklist (any pilot want to chime in?) - then even with autopilot disengaged modern jets will still operate flight control surfaces if a 'dangerous' configuration is detected. Of course with bad data going in you get bad data out, so the FCC can take actions that put the aircraft in danger as it thinks it's in a situation is isn't really in. As far as I understand it, you can't simply override these inputs with pilot input, you need to actually shut down the FCC to get back control.
- lisper 8y agohttps://leehamnews.com/2018/11/07/boeing-issues-737-operations-manual-bulletin-after-lion-air-accident/ https://leehamnews.com/2018/11/07/boeing-issues-737-operatio...
- caf 8y agoYes, in fact the AD update to the flight manual is a list of further indications for when the Runaway Stabilizer procedure should be followed.