As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOG PAGE 665330 DEFECT: LT HYDRAULIC PRIMARY PUMP EICAS MSG WITH ASSOCIATED PRESSURE SWITCH LIGHT ILLUMINATED. REMOVED & REPLACED THE NR 1 ENG HYD ADP IAW AMM 29-11-05-401. RAN THE NR 1 ENGINE IAW AMM 71-00-00-712-021-N00, NR 1 ENGINE ADP. NO LEAKS NOTED, OPS CHECKED GOOD. OK FOR SERVICE.