As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) ON DESCENT WHILE LEVELING AT 3,000 FEET WE SMELLED A SUDDEN IN FLOW OF DIRTY SOCK MUSTY ODOR. 10 SECONDS LATER, THE LEAD FA CALLED TO REPORT THE SAME THING. /PERFORMED TASK CARD A32X-21-000-001 AND AMM 21-00-00-615-802A USING APU AS BLEED SOURCE. NO FINDINGS AT THIS TIME. COMPLETED TASK CARD A32X-21-000-002.