As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2309: FLAP POWER CAUTION LIGHT. RESET PER CHECKLIST AND FLAP POWER CAUTION LIGHT CAME ON AGAIN. MAINTENANCE FOUND NR 1 HYD QTY DROPPING APPROX 30 PERCENT WHEN NR 1 ENGINE IS STARTED. BLEED NR 1 HYDRAULIC SYSTEM IAW Q400 AMM 29-10-00, SUBTASK 29-10-00-870-029. PERFORMED OPERATIONAL TEST OF THE FLAPS IAW Q400 AMM 27-50-00. OPS CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.