As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EUG FLIGHT NR 2280: NR 3 HYD CAUTION LIGHT ILLUMINATES DURING NR 3 HYD SYSTEM CHECK AFTER START. AIRCRAFT RETURNED TO BLOCK. MAINTENANCE SERVICED NR 3 SYSTEM MAIN ACCUMULATOR IAW Q400 AMM TASK 12-30-00. PERFORMED ENGINE RUN, SYSTEM OPS CHECK GOOD. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.