Comment by padjo
1 day ago
It’s nowhere near an obvious conclusion. A failure with the locking mechanism or muscle memory confusion are just as likely, and probably other theories I’m not thinking of. More investigation is clearly needed, which is why this is called a preliminary report.
Dual failure of the locking mechanism is extremely unlikely. These are not switches that are regularly used so a muscle memory issue also seems very unlikely (but is still the most likely non-suicide scenario)
If the switches have an unknown design flaw then it’s unknown how likely it is they’d both fail simultaneously
My understanding is these switches are used routinely during the shutdown procedure or did I get that wrong?
These switches are used at the end of literally every flight
The biggest problem with these theorising comment threads is the confidence people who know nothing about flying spout their theories
(I know nothing about flying)
Muscle memory? That’s grasping. How many times have you been pulling onto the highway and accidentally turned off your ignition?
I’d buy “mechanical defect” if it was only one switch. Two? At the exact same time? During takeoff? Nope.