As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 5008, ON DESCENT EXPERIENCED MUSTY GYM SOCK ODOR. BEGAN APPROXIMATELY 18,000 FT AND CONTINUED THROUGH DESCENT. REPLACED NR 1 & 2 ENGINE FAN SHAFT COVER SEAL PER AMM 72-15. PERFORMED LEVEL B DECONTAMINATION OF ECS SYS PER AMM 21-00. C/W LEVEL B DECONTAMINATION OF BLEED AIR DUCTS PER AMM 36-10. (LP 7891870)