What was found
ENROUTE FROM DCA T 1252Z HYD2 LOW PRESSURE MESSAGE COMPLIED WITH QRH DIVERTED. HYD QTY NR 2 SYSTEM READS ZERO. PRESSED FDR EVENT BUTTON. LANDING WEIGHT 46900, BRAKE TEMP READS 4,5,4,4. REMOVED AND REPLACED ENGINE DRIVEN HYDRAULIC PUMP NR 2. OPERATIONAL AND LEAK CHECKS GOOD. (K)