As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA- ON FLIGHT 2307 ELECTRICAL SMELL AROUND MAIN CABIN DOOR. DETERMINED SMELL TO BE COMING FROM GASPERS. SELECTED RECIRCULATION FAN OFF. RAN APU WITH ENGINE BLEEDS WITH NO ODOR. RESELECTED RECIRCULATION FAN ON, ODOR RETURNED. REMOVED AND REPLACED RECIRCULATION FAN. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.