Technician reported an aircraft returned to the gate after flight control checks revealed both Out Board Ailerons were not functional. Maintenance reset circuit breakers and the plane blocked back out.

Narrative

Aircraft X had a deferred LH Aileron Lock Out; Maintenance Personnel who deferred the LH aileron failed to read the MEL procedures and pulled both left and right aileron lock out circuit breakers. The Aileron was deferred in ZZZ then flew to ZZZ1 as flight number XXXX. To my knowledge some troubleshooting was done in ZZZ1 causing a delay on the next leg to ZZZ2 as flight number XXXY. Plane arrived to ZZZ2 as a quick turn at XA31L on Day 1 the flight crew who flew the leg XXXY stated no maintenance issues but that the plane felt sluggish due to the LH aileron lock out deferral. Plane blocked out of Gate at XY12 with a new flight crew. The pilots were taxiing the aircraft and doing flight control checks and realized BOTH outboard ailerons were not functional. flight crew decided to do a Gate turn back as the plane can not fly without OB ailerons. Maintenance personnel concluded both OB ailerons were INOP due to previous techs pulling the RH aileron lock out Circuit Breaker. In this configuration the aircraft flew at least one leg with NO functional OB ailerons. The planes IB ailerons and flight spoilers were the only lateral control the aircraft had. Maintenance in ZZZ2 then pushed in the RH aileron lock out CB and the RH aileron became functional. Maintenance entries for ops checks and CB reset were made and the plane blocked back out as XXXZ to ZZZ3 at XB48L.