As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 623 - CABIN HAS DIRTY SOCK ODOR FROM TOP OF DESCENT TILL ARRIVING AT GATE. REMOVED AND REPLACED APU. OPERATIONAL AND LEAK CHECKED GOOD. VENDOR REPORTED SIGNS OF INGESTION AT APU INLET AND NEAR COOLING AIR DISTRIBUTION DUCT. AFTER DISASSEMBLY, UNIT ALSO SHOWED SIGNS OF INGESTION AT L/C INLET BELLMOUTH.