What was found
PHX - UPON ARRIVAL, FLIGHT CREW REPORTED 'A' SYSTEM HYDRAULIC LIGHT FLICKERED, THEN LOST AL SYSTEM 'A' HYDRAULICS AT ALTITUDE. 'B' SYSTEM AND STANDBY SYSTEM REMAINED NORMAL. REPLACED DEFECTIVE 'A' SYSTEM MAIN HYDRAULIC SUPPLY LINE TO ENGINE DRIVEN HYDRAULIC PUMP AT RIGHT OUTBOARD WALKING BEAM. PERFORMED LEAK CHECK AND SERVICED HYDRAULIC SYSTEM PER MM 29-09-121A AND WORK CARD 1-1101A AND CHECKED OK. (M)