What was found
DURING DESCENT, FROM 600 FT TO THE GATE, HAD AN ODOR IN THE CABIN AND COCKPIT. BOTH PACKS AND BLEEDS ON, APPLIED TSM 05-50-810-813-A, PERFORMED GVI. CHECKED NO OIL CONTAMINATION IN THE APU IAW AMM 49-16-00. RAN BOTH PACKS WITH ENGINES ON, IAW AMM 71-00-00 AND SUSPECT ODOR SOURCE FROM THE NR 1 PACK.