What was found
AIRCRAFT RETURN TO BLOCK WITH ELECTRICAL SMELL AND SMOKE FROM FIRST CLASS NUMBER 4 FLUORESCENT LIGHT ARCING. REPLACED BULB HOLDER ASSY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT RETURN TO BLOCK WITH ELECTRICAL SMELL AND SMOKE FROM FIRST CLASS NUMBER 4 FLUORESCENT LIGHT ARCING. REPLACED BULB HOLDER ASSY.