As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR FLIGHT 3659 DURING PREFLIGHT INSPECTION THE CREW REPORTED A BURNING PAPER ODOR IN THE CABIN AND AN ELECTRICAL SMELL ABOVE F/A 1 SEAT. THE AIRCRAFT WAS RELEASED FOR FUNCTIONAL CHECK FLIGHT PURPOSES ONLY. THE FUNCTIONAL CHECK FLIGHT WAS SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.