As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED A BURN LIKE ODOR IN THE CABIN - COCKPIT. THE ACFT WAS INSPECTED AND THE FORWARD LIGHT BALLAST WAS DEACTIVATED. MX R & R THE FIRST CEILING LIGHT HARNESS, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.