As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT LEVEL 250, RECEIVED HYD NR 1 LOW PRESSURE CAUTION. COMPLIED WITH QRH HYD PUMP NR 1 B DIDN'T PROVIDE PRESSURE QTY READS DASHES. REMOVED AND REPLACED EDP 1 HYD PRESSURE LINE IAW AMM 29-11-00, LEAK CHECKS REF LP 234637/2 FOR EDP CHANGE.