As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES OF UNKNOWN ORIGIN DETECTED BY FA'S IN AFT CABIN DURING DESCENT. AFTER PACK #2 WAS ISOLATED, THE ODOR DISSIPATED. ( PACKS A320 WITH MOD 31283/MP P7125 (FWC H2-F1 STND) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) - FAULT CAUTIONS ASSOCIATED WITH OPERATIVE SIDE NOT DISPLAYED )--