As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THROUGH 8000', A STRONG ODOR OF BURNING PLASTIC. NO SMOKE, 10 MINUTES LATER THE ODOR DIMINISHED. FLIGHT ATTENDANTS REPORTED ODOR IN CABIN, STRONGEST IN MID CABIN. SUPPLEMENT TO BE FILED UPON FINAL CORRECTIVE ACTION. FOUND SOF COMING FROM L/H PACK COMPONENTS. PARTIAL WORK ACCOMPLISHED-ACCOMPLISHED J/C 26L00021001 A320 SOF INITIAL T/S AND J/C 26L00021004 DECONTAMINATION OF ECS. REPLACED AFFECTED LEFT HAND PACK COMPONENTS. HEAT EXCHANGER SEPARATED AND FOUND DIFFUSER DRY ROTTED.