What was found
AS AIRCRAFT TAXIED TO THE RUNWAY AT LAX, THE FLIGHT CREW EXPERIENCED A FAILURE OF THE NR 3 HYDRAULIC SYSTEM. THE CAPTAIN ELECTED TO RETURN TO THE GATE. MAINTENANCE PERSONNEL FOUND THE NR 3 ENGINE DRIVEN LEFT HYDRAULIC PUMP INOP. THE PUMP WAS REMOVED AND REPLACED. AN OPS AND LEAK CHECK WERE PERFORMED SUCCESSFULLY ON THE PUMP IAW MM 29-11-20. THE AIRCRAFT WAS THEN RETURNED TO SERVICE. (M)