What was found
ON DEPLANING, THE F/A REPORTED DETECTING AN ODOR ON DESCENT, AND DISSIPATED. DURING GROUND OPS, FIRST OFFICER ALSO NOTICED THE FUMES. APPEARED TO BE MOSTLY CONCENTRATED IN THE MID CABIN AREA, ROWS 10-18. THE AIRCRAFT WAS GROUNDED. MAINTENANCE PERFORMED CARD 26L0002102. FOUND THE APU OIL SERVICING PLUG ASSY TO BE SOURCE OF THE OIL LEAK. REMOVED AND REPLACED APU OIL FILLER ASSEMBLY IAW AMM 49-91-00. LEAK CHECKED GOOD.