As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KAGS - FOLLOWING TAKEOFF THE CABIN FILLED WITH A BURNING SMELL. THE AIRCRAFT WAS RETURNED TO KAGS AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE COULD NOT LOCATE ANY BURNING OR BURNING SMELL IN THE CABIN AREA WHEN INVESTIGATING THE DISCREPANCY. THE BURINING SMELL WAS REPORTED TO HAVE DISSIPATED DURING DESCENT INTO KAGS. THE AIRCRAFT WAS RETURNED TO SERVICE.