As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT GROUNDED) FA REPORT SOUR/DIRTY SOCK SMELL IN FRONT (EXIT ROW FWD) ON DESCEND, I CONFIRM SOUL SMELL IN GALLEY AREA. ALSO ALL FA'S REPORT SMOKY/HAZEY APU IN CABIN THROUGHOUT THE CABIN ON DESCENT/APPROACH APU WAS OFF DURING START OF THIS EVENT. / PERFORMED LEVEL 2 TC 21-000-002. SMELL WAS NOT REPRODUCED DURING LEVEL A DECONTAMINATION. THIS CLEARS MEL 49-10-01A & MDDR 202871. PLACARDS REMOVED.