As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED "PLASTIC BURNED SMELL IN AFT GALLEY" C/W FAULT ISOLATION PROCEDURE FOR UNUSUAL SMELL IAW BD500-A-J21-22-00-00AAA-423A-A. LOCATED ORIGIN OF SMELL TO AFT GALLEY HEATER COLLECTION OF LINT ON THE HEATER SCREEN. REMOVED LINT. COMPLIED WITH TEST FOR ODOR FOR RETURN TO SERVICE NO ODORS PRESENT. NO MORE CORRECTIVE ACTION NECESSARY. AIRCRAFT OKAY FOR RETURN TO SERVICE.