As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#873, BOS- AUA. 'FA'S HAD DIRTY SOCK SMELL DESCENDING THROUGH 6000 TO LANDING FROM AFT CABIN TO L3 DOOR, NOT IN COCKPIT ( PACKS ); COMPLIED WITH INFO NOTICE 2017-T015 SECTION B2 IDENTIFIED ODOR AS APU THE CAUSE DECONTAMINATION LEVEL B WAS ACCOMPLISHED TSM 05-50-00-810-831-A AC OK FOR SERVICE PACK 2 REACTIVATED MX-4 UPDATED MCC NOTIFIED MDDR CLEARED.'