As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS FLT 710 PHL TO ZRH. STRONG CHEMICAL SMELL IN AFT GALLEY OCCURRED IN FLIGHT, APPROXIMATELY 30 MIN AFTER TAKEOFF. MAINTENANCE INSPECTED THE AIRCRAFT. NO ODORS WERE NOTED. THE AIRCRAFT WAS FOUND OK FOR SERVICE. AS A PRECAUTION, MAINTENANCE REPLACED THE HEPA FILTERS.