As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VERY BAD "DIRTY SOCK ODOR" FROM BLEEDS ON LOW POWER DECENT. R & R RECIRCULATION FILTER W/ NEW IAW AMM 21-22-22-000-801/-400-801. RAN A/C W/ BLEEDS 1 & 2 SELECTED ON SEPERATELY, AND THEN TOGETHER. NOTED NO FURTHER "DIRTY SOCK ODOR" OR ABNORMAL SCENT. NO FURTHER DEFECTS. RETURNED TO SERVICE.