As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT FLT ATTENDANTS REPORT A "DIRTY SOCK, PUNGENT" SMELL IN THE AFT HALF OF THE CABIN THE LAST 40 MINS OF FLIGHT. SMELL CLEARED UPON LANDING. FOUND HYDRAULIC LEAK AT YELLOW HYD DRAIN VALVE (GS 315183). REPLACED YELLOW HYD DRAIN VALVE PER A321 AMM 29-13. (LP 7774600, 1197618)