As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A S REPORT A BURNING PLASTIC ODOR NEAR 3L/3R ON DESCENT BELOW 10000. DEBRIEFED CREW, ODOR WAS PRESENT MOMENTARILY AT DOORS 3L & 3R. NO ODOR WAS PRESENT IN CREW REST OR LAVS. ACCOMPLISHED CONDITIONAL INSPECTION FOR SMOKE ODOR IN THE CABIN REF AMM 05-51-58-800-801-C3. NO ODOR, FUMES, OR SMOKE FOUND IN CABIN.