What was found
FUMES REPORTED AT ROWS 24 - 25 AT IDLE, DURING DESCENT. TURNED OFF THE NR 2 PACK AND STARTED SMELLING FUMES IN THE COCKPIT, FUMES SMELLED LIKE BURNING OIL. PERFORM TSM 05-50-00-810-831-A, NO ODOR NOTED DURING ISOLATION. INPECTED APU COMPARTMENT NO OIL LEAK NOTED IAW AMM 49-90-00