As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, THE LEFT AFT CEILING PASSENGER CABIN LIGHTING CIRCUIT BREAKER POPPED. UNABLE TO RESET. FLIGHT ATTENDANT REPORTED A SMOKE SMELL. RETURNED TO GATE. REPAIRED BURNED WIRE BUNDLE ABOVE CEILING PANEL AT SEAT 10ABC PER BOEING WIRING PRACTICES MANUAL 20-00-13 AND WIRING DIAGRAM 33-22-01, PG 5, SHEET 1, SYSTEM CHECKS NORMAL.