What was found
(CAN) ON THE TAXI IN, ENGINE NR 1 RUNNING, ENGINE NR 2 WAS OFF. LOW QTY INDICATION HYD 1. MAINTENANCE INVESTIGATION REVEALED THERE WAS A LEAK AND HYDRAULIC QUANTITY WAS ZERO. ACFT OFF-LINE FOR REPAIR. NR 1 ENGINE EDP HIGH PRESSURE LINE RUPTURED IN FWD PYLON. REPAIRED RUPTURED LINE IAW AMM20-10-03. AMM05-50-023-200-801 FOLLOWED UP. REPLACED NR 1 ENGINE EDP IAW AMM29-11-01. REPLACED NR 1 HYDR SYS PRESSURE FILTER + CASE-DRAIN FILTER IAW AMM29-11-05.