As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK SMELL ON DESCENT INTO BWI AT 6,000' WITH IDLE THRUST-PERFORM TSM 05-50-00-810-831-A FOUND OIL RESIDUE BEHIND ENG #1 SPINNER CLEAN AREA IAW AMM 72-11-01 PERF. ENG. RUN-UP PACK #1 AND #2 ORDER CANNOT DUPLICATED A/C GOOD FOR SVC.