4 ms·
> Modern airliners have zero single points of failure. The have zero points of failures that are classified as single-point-of-failure. Once in a while, the c
by oldgradstudent 5y ago
> Modern airliners have zero single points of failure.
The have zero points of failures that are classified as single-point-of-failure.
Once in a while, the classification turns out to be incorrect, as seen in the 737 MAX crashes, especially the first one.
- WalterBright 5y agoThe redundancy in the MAX crashes was the pilots following the runaway trim procedure. Of the 3 MAX incidents, the one you never hear about is the one where the pilots followed that procedure and continued the flight normally. Boeing still should never have had the MAX system rely on only one AOA sensor.
- sumedh 5y ago> pilots followed that procedure Were these pilots trained with the new procedure and the other pilots who died not trained?
- WalterBright 5y agoNo. It was the LA flight immediately prior to the LA flight that crashed. They trimmed it back to normal a couple times, then just turned it off. Sounds too simple to be true, but it is true. There's a toggle switch on the console that cuts off power to the trim system. It's there in case of runaway trim.
- mlyle 5y agoJust to add, it was the normal "runaway trim" procedure-- nothing new. The thing is, this revealed a vulnerability: real pilots in runaway trim scenarios do not do nearly as well as they do in training. And 737MAX ended up testing crews with runaway trim scenarios at a much higher rate than they had been at the past. Some crews failed.