As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON START OF NUMBER 2 ENG.FA IN BACK SAID PAX SMELLED FUMES FROM ENG. SMELL GONE IN 1 MIN PER CONVERSATION WITH TOMC. RAN NR 2 ENGINE THEN STARTED AIR CONDITION ON. NO FUMES IN CABIN. PER AMM 05-51-56-200-801 NO ACTION REQUIRED. ALSO FUME CHECK LIST.