As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FT # 179, AFTER LANDING F/A'S COMPLAINED ALONG WITH PAX THROUGHOUT CABIN OF MUSTY/DIRTY SOCK SMELL AS DESCENT STARTED INTO LGB AT APPROXIMATELY 8000 UPON LANDING IN LGB FLIGHT CREW NOTICED SMELL ONCE COCKPIT DOOR WAS OPEN. C/W INFO NOTICE 2017-T015E, T/S TO BE A LEVEL 1 ENVIROMENTAL SYS ODOR. RAN PACKS NO ODOR NOTED. A/C OK FOR CONT SVC.