As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - APU DID NOT START AFTER ARRIVAL. RAMPERS REPORTED -SMOKE OR FOG- AND FLUID DRIPPING FROM APU BAY. MAINTENANCE CHECKED APU OIL LEVEL AND REPLENISHED AS NECESSARY IAW Q400 AMM 49-90-00, TASK 49-90-00-612-801. NO FAULTS IN CDS. STARTED IN APU AND CHECKED FOR LEAKS. NO LEAKS NOTED. APU STARTS SUCCESSFUL. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.