As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3145 FA'S NOTICED AN ODOR, THEY DESCRIBED AS "MOLDY". IN COCKPIT WE SMELLED WAXY SCENT. WENT AWAY ON LANDING. AT GATE W/ APU ON OIL SMELL IN COCKPIT. PERFORMED LEVEL B CONTAMINATION OF ECS PER A321 AMM 21-0. R/R RECIRC FILTERS PER A321 AMM 21-21. (7291938).