B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 184; Flight Crew Type 10000
Aircraft Equipment Problem Less Severe
Flight Crew Landed in Emergency Condition; Flight Crew Overcame Equipment Problem
Aircraft
On downwind; the A-system engine driven light flickered. There was about 25 percent quantity remaining. We lowered the gear immediately before losing the entire A-system. Shortly thereafter the A-system quantity was zero and both lights were illuminated. We accomplished the checklist on the turn to final and prepared to land. I [advised ATC of the situation] in order to reduce the radio calls for base to final turns and was sent to Tower. We landed uneventfully and were able to taxi to the gate.
B737 Captain reported loss of A hydraulic system on approach.