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Breathalysers don't detect tired or suicidal pilots.

The interim report stated copilot was pilot flying meaning they only focus on flying and he had also just flown already today. Captain however was his first flight in his shift and was also pilot monitoring.

There is no procedure that involves cutting off fuel to both engines while in-flight; one at a time, but not both. Then, there is no procedure that ever involves touching those controls during takeoff. Finally; there would be communication between the pilots discussing any such troubleshooting, they wouldn't just take it upon themselves to start flipping switches without at the very least letting the other pilot know what they're doing. Particularly when it comes to troubleshooting; there is a strict set of checklists they go through as a team, with one reading out questions, the other responding with data/answers from the instruments and the first confirming that response.

These were both experienced pilots with ample flight hours; they knew what they were doing at those controls. I'm not going to throw human error out the window entirely, but it's not looking very likely unfortunately.

Either that plane was brought down intentionally, or there was a stunning error in judgment wildly disregarding procedure in that cockpit that was not communicated at all. (note: the mics record to the blackbox continuously, they're not ptt, if one of the pilots had said something, it'd be on the tape.)

There’s no communication between the two pilots before the switches were moved to cutoff to suggest they encountered any problems prior to fuel cutoff.

From the article...

The fuel switches were “designed to be intentionally moved,” according to CNN safety analyst David Soucie, who said cases in which all fuel switches were turned off accidentally are “extremely rare.”

“Throughout the years, those switches have been improved to make sure that they cannot be accidentally moved and that they’re not automatic. They don’t move themselves in any manner,” Soucie said on Friday.

And the photo of the throttle (middle) and fuel cutoff switches (bottom):

https://media.cnn.com/api/v1/images/stellar/prod/c-gettyimages-951922648-20250711223914009.jpg?q=w_1160%2Cc_fill%2Ff_webp

There's just one-level-deeper of questions I'd have here. How were the switches designed such that they prevented accidental activation? Because it looks like they just get simply flipped down. Could it be pull-out-and-down? Or maybe there's a lot of resistance during the switch action?

Highly recommend everyone give this a listen. It covered most of the other possibilities people are bringing up in this thread:

• They have to be pulled out, moved, and pushed back in to change the state
• The plane cannot take off with them in the wrong position
• There is no procedure to ever toggle both off at the same time, and no procedure to toggle them off period at their low altitude
• Both were toggled off within 1 seconds of each other
• The engines were functioning normally when they were toggled off

Captain Steve really tried to not blame the pilots in previous videos about this crash, in fact he really believed it had to be something else, so it says a lot that this is the only conclusion he can come up with.

Petter and Ben from Mentour Pilot all but said they came to the same conclusion

In the cockpit voice recording, one of the pilots is heard asking the other why did he cutoff. The other pilot responded that he did not do so." https://www.bbc.co.uk/news/live/cx20p2x9093t

Until there's independent evidence otherwise I'm going to assume either fudged maintenance reports or the switch designer at boeing is about to commit suicide by shooting themself in the back of the head hours before talking to the press.