Russ Niles of AvWeb adds this take:
Without Video, We'll Never Really Know - AVweb
AVWEB.COM
Will the real cause of the crash of Air India 171 ever be known?
Excerpt:
"As with everything else it seems, those switches feed wires that end up at a computer, which has the final decision on whether the simple opening or closing of a circuit can proceed. That little box, strapped unceremoniously to the main fan housing of the massive engine, controls all things to do with the fuel, including its sudden absence, a handy feature if it’s on fire but a disaster a few seconds after the mains have air under them. A solder joint on that control unit is prone to cracking and airlines were advised to replace them in 2021.
This plane was said to be up to date on all those sorts of maintenance advisories, so I assume it was done. But the working theory heading around the airline blogs and forums is that it’s possible that a cracked solder joint interrupted the current from the switches under the Gs of rotation to stop the fuel flow long enough to shut down both engines. As far-fetched as it seems, it introduces enough doubt to lay waste to all the other depressing scenarios being bandied about and the arguments that flow from there."