As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DIRTY SOCK ODOR ON DESCENT INTO DFW. NOTICED IN FLIGHT DECK ONLY. APU HAD BEEN PLACED ON MEL AS ODOR SOURCE ON PREVIOUS FLIGHT (SEE AALA202203214127). ACCOMPLISHED SMOKE ODOR FUME JOB CARD 26L00021001, APU SMOKE ODOR FUME JOB CARD 26L00021002. APU CONFIRMED AS ODOR SOURCE. ACCOMPLISHED DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM JOB CARD 26L00021004. OK FOR SERVICE.