As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 1726574) CREW REPORTS STRONG DIRTY SOCK SMELL THROUGHOUT AIRCRAFT. T/S PER B737 FIM 21-00 TASK 806. FOUND APU SURGE DUCT CRACKED AND GRAY PLASTIC TRASH BAG MELTED ON APU COMPRESSOR INLET SCREEN. REMOVED TRASH BAG AND VERIFIED NO DEBRIS REMAINS. REMOVED AND REPLACED APU SURGE DUCT PER B737 AMM 49-52-41 REF B737 AIPC 49-52-41-02 ITEM 15L. LEAK CKS GOOD.