What was found
SFO - ON INBOUND FLIGHT TO SFO, FLIGHT CREW REPORTED LOSS OF 'A' SYSTEM HYDRAULIC PRESSURE AND FLUID. USED ALTERNATE FLAP SYSTEM AND AIRCRAFT LANDED WITHOUT INCIDENT. REPLACED NR 1 ENGINE 'A' SYSTEM HYDRAULIC PRESSURE LINE IN AFT FLAP WELL, BOTH 'A' SYSTEM HYDRAULIC PUMPS (NR 1 P/N 65075-01, S/N 184104AK, NR 2 P/N 65075-06, S/N 183975), NR 1 AND NR 2 ENGINE PUMP CASE DRAIN FILTERS. 'A' SYSTEM HYDRAULIC RETURN FILTER. PERFORMED LEAK AND OPERATIONAL CHECK AND SYSTEM CHECKED OK. (M)