As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANTS REPORTED BURNING, AMMONIA ODOR IN FWD GALLEY AREA DURING DESCENT FROM FL180. NO SMOKE. PERFORMED FUMES IN CABIN CONDITIONAL INSPECTION IAW AMM 05-51-56 AND FOUND RECIRCULATION FILTER EXCESSIVELY DIRTY. CLEANED FILTER HOUSING & R & R RECIRCULATION FILTER IAW AMM 21-25-01. OPS CHECK GOOD WITH NO ODOR PRESENT.