As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA-SUP, ON FLIGHT NUMBER 2340, AFTER TAKE OFF PASSENGER SMELLED BURNING RUBBER-TYPE SMELL IN ROWS 17 & 18, ALSO AFTER LANDING SAME SMELL IN REAR OF CABIN. DETERMINED OIL SMELL FROM APU. FOUND APU OIL OVERSERVICED BY 12-14 OZ. DRAINED OFF EXCESS OIL. RAN APU. COULD NOT SMELL BURNING RUBBER OR OIL SMELLS. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.