As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLT ATTENDANTS REPORT AMMONIA/PLASTIC SMELL. EXECUTED SMOKE FIRE FUMES QRH. RECIRCULATION FAN FILTER REPLACED IAW AMM PUNGENT SMELL WAS DETECTED. RAN THE AIRCRAFT 21-25-01. ENGINES HIGH POWER RAN IN REFERENCE WITH BOEING AMM ENGINES. BOTH PACK SYSTEM CHECKED IN REFERENCE WITH BOEING AMM21-51-00. ALL FOUR EMPLOYEES WALK THROUGH THE AIRCRAFT,