As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3142 - DIV/FUMES - DIVERTED TO RIC FOR OILY SMELL IN CABIN. CORRECTIVE ACTION: FOUND OIL ON APU EXTERIOR, NO OIL INGESTION FOUND IN INLET OR BLEED DUCT USING UV LIGHT. NO OIL FOUND BEHIND ENGINE SPINNERS. COMPLIED WITH DUCT BURNS AND ECS DECONTAMINATION. CLEANED APU DOOR. RAN APU AND PACKS FOR EXTENDED TIME. NO SMELLS. (LP 5713218, 5713220)