As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED & ACFT WAS GNDED. FLIGHT CREW REPORTED A BURNING & ELEC SMELL THROUGHOUT ACFT. DECLARED AN EMER & RETURNED WHERE THE ACFT LANDED SAFELY. MEDICAL ATTENTION WAS SOUGHT BY FLIGHT ATTENDANTS. ACCOMPLISHED TASK CARD 43L00021001, TROUBLESHOOT CABIN AIR QUALITY, NO DISCREPANCIES WERE NOTED & WERE UNABLE TO DUPLICATE ODOR. ACFT WAS RETURNED TO SERVICE.