As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3327 DIRTY SOCK SMELL WHEN APU IS IN USE. CORRECTIVE ACTION: FOUND DIRTY SOCK SMELL WHEN APU IS IN USE. ISOLATED BOTH ENGINES NO SMELL EVIDENT. INSPECTED APU DUCTING (BLEED) FOUND EVIDENT OF OIL IN DUCTING AND COMPRESSOR SECTION. APU REMOVED + REPLACED. C/W ECS DECONTAMINATION. R/R L + R WATER EXTRACTOR. R/R L + R PACK FLOW CONTROL VALVES. PERFORMED OPS CHECK OF SYSTEM. (4436838)