As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 5029 - SMOKE AND SMELL OF ELECTRICAL BURNING REPORTED OVER SEAT 10A IN FLIGHT. MOC WAS NOTIFIED BY DISPATCH. PILOT ELECTED TO RETURN TO MIA. FOUND TRANSFORMER BURNED OUT AT SEAT 10 A/B ON THE PSU POWER SUPPLY. REMOVED AND REPLACED POWER SUPPLY IAW AMM 33-25-00, OPS CHECK GOOD. (M)