What was found
ON APPLYING TAKEOFF POWER, RECEIVED A MASTER CAUTION AND ECAM NR 1 PRESSURIZED. NR 1 ENGINE THRUST REVERSER PRSOV AND DPV REPLACED IAW AMM 78-31-05 AND 78-31-06. THRUST REVERSER OPS CHECKED AND ENGINE GROUND POWER RUNS CARRIED OUT, SYS OPS CHECKED GOOD IAW 78-31-00. ENGINE GROUND RUN CARRIED OUT IAW AMM 71-00-00, SYS OPS SATISFACTORY.