As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG ELECTRICAL SMELL DURING THE APU START UP AND F/A STATED THE ODOR WAS STRONGEST OVER THE WING. CREW STATED ALL COCKPIT INDICATIONS WERE NORMAL. FLIGHT LANDED WITHOUT FURTHER INCIDENTS. PAX STATED THE OVERHEAD FLUORESCENT LIGHT AT ROW 18 WAS SPARKING AND FLASHING. MX FOUND BULB HOLDER SPARKING ABOVE 18 ABC. MAINTENANCE INSTALLED LIGHT SOCKETS AT ROW 17/18 PER IAW SWPM 20-11-03. OPERATION OF LIGHTS NOW CHECKED OK.