As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3123 - ON APU START, A WET DIRTY SOCK SMELL. R & R SURGE VALVE PER A319 AMM 49-51. FOUND EVIDENCE OF LEAKING ON AND NEAR APU COOLING FAN, REPLACED PACKINGS AND INSPECTED FOR CRACKS, NO CRACKED FOUND. OPS AND LEAK CHECK OF APU COOKING FAN AND SURGE VALVE GOOD.(7908856)