What was found
AIRCRAFT WAS GROUNDED: ON TAXI OUT AND APPLYING BRAKES, BRAKES PULSED MODERATELY. FLIGHT ATTENDANTS REPORT UNUSUAL NOISE AND KNOCKING SOUND. **SUPPLEMENTAL REPORT FOR AALA202303139395: DURING A REVIEW OF THE FOQA DATA IT WAS NOTED THAT THE #1 ENGINE DRIVEN HYDRAULIC PUMP WAS PRODUCING APROXIIMATLEY 120 PSI GREATER THAN THE AMM LIMITS AND THE #2 ENGINE DRIVE HYDRAULIC PUMP WAS PRODUCING RIGHT AROUND THE MINIMUM PRESSURE. MAINTENANCE REPLACED THE #1 AND #2 (AALA202303140003) ENGINE HYDRAULIC PUMPS PER AMM 29-11-51. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED. ** (CLOSED)