As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL BURNING SMELL THROUGHOUT CABIN AT DECENT. WENT AWAY O N ITS OWN AFTER FEW MIN. REF FIM 21-00 TASK 806. INSPECTED CABIN IFE EQUIPMENT, NO DEFECTS NOTED. RAN BOTH ENGINES AND PACKS, NO ABNORMAL SMELLS DETECTED. ACFT OK TO CONT.