Are you sure??
Loss of hydraulic system A would result in the gear being stuck down, but the flaps are driven from hydraulic system B, so there should have been no issues with them.
Are you sure??
Normal brakes on a B737 are on B system hydraulics, so there is no reason for the brakes to have failed.
I believe you're describing the 737NG.
The accident aircraft was a 737-200. On the -200, Hydraulic System A controls all flaps and slats, ground spoilers, both thrust reversers, nose wheel steering, and the inboard brakes.