As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 379, (DCA-FLL). SMELL OF HOT OR BURNING PLASTIC WHILE DESCENDING 16,000 - 8,000; APU RAN PRIOR TO FLT 379 FOR TROUBLESHOOTING UPON INSPECTION FOUND OIL LEAKING FROM APU OIL COOLING FAN DOR WAS CLASSIFIED AS LEVEL 1 COMPLIED WITH INFO NOTICE 2017-T015SECTION B(2)A/C OK FOR SVC REMOVED +REPLACED BOTH RECIRC FILTERS AS REQUIRED IAW A 320 AMM 21-21-41. OPS CHECK OK @ THIS TIME A/C OK TO CONT SVC.