That way, if you have one faulty sensor, it gets outvoted.
The MCAS system in the new 737-MAX's only have 2 AoA sensors, which means a single faulty sensor can cause bad things to happen.
That's pretty damning if true.
The reddit thread linked from elsewhere says the same thing.
The preliminary report on the Lion air crash (http://knkt.dephub.go.id/knkt/ntsc_aviation/baru/pre/2018/20...) says they replaced and tested the AoA sensor 2 days prior.
They repeatedly refer to the AoA sensor using only singular nouns everywhere.
Given the report says it was giving faulty data and that was used, the only way this can occur is either:
1. Their are multiple sensors and the software is broken
2. There is a single sensor
Given all other data, i'm going with #2 :)
Nobody has been enterprising enough to publish the MAX8 troubleshooting/etc manuals online, if they did, you could easily verify this.
If true than that's preposterous.
https://s3media.freemalaysiatoday.com/wp-content/uploads/201... https://static.businessinsider.com/image/5be287c7b73c2846bb4...
Do you have anything real to add here other than "I am Very Smart and everyone else is not"?
For example, whether it is a fly by wire system or not does not change anything about what i said about the sensors.
That way, if you have one faulty sensor, it gets outvoted.
That would make sense, but unfortunately it's not the way they're actually implemented. Several incidents with Airbus aircraft were due to one AoA sensor's faulty input being allowed to trigger uncommanded pitch down events, instead of the one faulty sensor being outvoted by the other two.
I agree having only two sensors is even worse.