As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"UPON DECENT & RUNING HIGH PRESSURE VALVES CHECKLIST A STRONG SMELL OF MUSTY SOCK & SWEET LIKE BURNING MARSHMELLOW ODOR WAS NOTICED WHEN R BLEED PB SW DEPRESSED. ( PACKS A320 WITH MOD. 30626/MP K6443 (ENHANCED ECS) OR A321 WITH MOD. 157080/MP K17996 (PACK FLOW SELECTOR) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) )--"