As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RTFL DUE TO NR 1 ENGINE HYDRAULIC PUMP FAILURE. NR 1 ENGINE DRIVEN PUMP FOUND FAULTY. REPLACED NR 1 ENGINE DRIVEN PUMP. REPLACED NR 1 HYD EDP CASE DRAIN FILTER. NO METAL FOUND IN FILTER. CHANGED FILTER (P/N FLA161001144) PRECAUTIONARY, NO LEAKS NOTED ON ENG RUN.