If both engines failed, that means they would have lost hydraulic power too, which is probably the reason they couldn't extend the landing gear or try to go around a second time.

One of the theories floating around is that a bird strike caused one engine to flame out and the pilots pulled the cutoff switch on the wrong engine. It wouldn't be the first time something like that happened.

[–] halcyoncmdr@lemmy.world 8 points 18 hours ago

IIRC the emergency landing gear deployment relies solely on gravity to drop and lock them into place, it's a passive system. Not 100% effective, but something that doesn't require a powered system of any kind for emergencies. Even if they didn't lock into place, they would at least deploy, which doesn't seem to have been the case here.

The cutoff to the wrong engine is sadly the most likely given the rest of the context like altitude and already aborting one attempt due to the strike. Lots of things to track that low to the ground, easy to forget you didn't deploy the landing gear the first time when your focus was trying to keep it in the air at that point and then going around and realigning for another attempt while also shutting down an engine.