What was found
IN FLIGHT, JUST BEFORE DESCENT, NR 1 HYD QUANTITY DROPPED TO 1 GALLON. CREW PERFORMED IRREGULAR CHECKLIST PROCEDURES, NORMAL, IN CONTACT WITH FLIGHT CONTROL, IT WAS ADVISED FOR MAINTENANCE THAT A RETURN WAS CONSIDERED, CREW AWS FLIGHT CONTROL DECIDED BEST TO RETURN TO DEPARTURE. ALL OTHER SYSTEMS, NORMAL. (K)