As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) AFT FLIGHT ATTENDANTS REPORT DIRTY SOCKS SMELL ABOUT 2 MINUTES BEFORE LANDING. APU BLEED WAS NOT ON AT TIME OF EVENT / PERFORMED LEVEL 1 TASK CARD 21-000-001. NO SMELL REPRODUCED AT THIS TIME. M313 GENERATED ON LP 2121264 FOR LEVEL 2 TC 21-000-002. SEE TC 21-000-001 FOR WORK PERFORMED. "