What was found
DURING DESCENT, HAD A VERY STRONG WET SOCK ODOR IN THE COCKPIT AREA. PERFORMED AN IDENTIFICATION OF CABIN ODOR IAW TSM 05-50-00, DECISION TABLE DETERMINES ODOR ORIGINATED FROM THE NR 1 ENG, PERFORMED A NR1 ENG RUN-UP IAW 71-00-00, UNABLE TO DUPLICATE, NO ODORS NOTED NO EVIDENCE OF OIL LEAKS AT APU COMPARTMENT. ACFT OK FOR SERVICE.