one would think such a fail state should be only accessible after the user has bypassed and confirmed the action.
let's be honest, do we trust boeing at this point?
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one would think such a fail state should be only accessible after the user has bypassed and confirmed the action.
let's be honest, do we trust boeing at this point?
is it clear that FADEC cannot cut-off via software?
So, so many poorly informed people in here jumping to conclusions, many of which were already ruled out in the preliminary report.
I don't know any more than what's in that document myself.
Perhaps some of the armchair aircraft safety investigators in here might want to at least skim the details before coming up with wild theories? Or at least provide reasoning and evidence to support them.
May those who lost their lives, and their loved ones, find peace and closure as best they can once we have all the details. Until then, it would be crass to speculate, especially as non-experts not privvy to the details of the investigation.
If I remember correctly, those switches need to be physically lifted up and rotated for the engines to switch from RUN to CUTOFF. there's also physical guards there to prevent pilots from knocking them. here's a diagram of the layout (source).
I've read theories that the pilot who manipulated the fuel switches could've mistook them for the stabiliser cutout switch but the switches are very different. the timing is also sus because it would've been at just the right time for things to have not been recoverable. 10 seconds earlier and the takeoff could've been aborted, 10 seconds later and the plane could've had enough altitude and speed to land in a safer area. also the way the pilot reacted to the other pilot suggests he saw the other pilot shut off the fuel to both engines one after the other and was in a state of shock
They lift up over a gate and you move them down to shut off, rather than turning. There’s no guard over them though. They’re not really close to any other switches you’d be manipulating at any time, especially right after takeoff, and they are a different shape than any other switch (Boeing likes to shape their switches differently so that if you grab the wrong one you’ll feel it). I cannot imagine how one could accidentally move one, let alone both switches do cutoff. But sometimes my brain does inexplicably dumb shit, so I dunno.
by guards I meant the guard brackets which help prevent accidental movement (source) but I agree I just can't see this being done accidentally. the look and feel of the switches are just so different it'd be almost like mistaking a red light for a green one with normal colour vision or something. it's still early days so i'm sure more will come out about the history of the pilots with time. if this does turn out to be intentional it's pretty scary because it's something that's unrecoverable at that phase of flight if it happens and that needs to not happen again
Oh, ya, ok. Those guards are really more to stop you whacking the side of the switches and breaking the plastic lens and lightbulbs in the top of the switch, but because the switches move up and down and not side to side, those brackets really have no impact on the actual moving of the switches, accidental or otherwise.