As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3053 - EWR - FLIGHT CREW REPORTED A STRONG ELECTRICAL/HOT PLASTIC SMELL NEAR SEAT 1A ASSOCIATED WITH OVERHEAD PANEL. EWR MX REMOVED AND REPLACED BALLAST AT ROW 1A AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. AIRCRAFT WAS APPROVED TO RETURN TO SERVICE.