Originally Posted by
mauve
What I'm missing, and maybe you can fill in, is if there was a total hydraulics failure that stopped the pilots from deploying both flaps and gear, how did they have the use of control surfaces for the go-around and final descent?
I know there must be at least a triple-redundant system for those, but don't the flaps also have an extra level of backup?
There is a manual method for lowering the landing gear on a 737NG in the event of a total hydraulics failure. The system is in the cockpit under a closed panel.
Why the landing gear was not lowered is one of many questions - and the CVR and FDR hopefully will provide factual evidence what the pilots were confronted with, and the actions they took (and why).