As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA REPORTED SWEET SMELL ON DESCENT AT 4,000 FT. POSSIBLE FUME EVENT. FOLLOWED COM PROCEDURE FOR ODOR IN CABIN. FA REPORTS ODOR CONTINUED.-INSPECTED APU AND ENGINE COMPARTMENTS AND FOUND NO EVIDENCE OF OIL LEAK. NO EVIDENCE OF ODOR WITH APU AND ENG LEEDS IAW AMM 05-50-00-810-831. AC IS OK FOR SERVICE