As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI- ON FLIGHT NUMBER 2458, BURNING OIL SMELL IN AIRCRAFT CABIN WITH APU IN OPERATION AND BLEED AIR EXTRACTION. OIL SMELL WENT AWAY WITH APU SHUTDOWN. RAN APU SEVERAL HOURS WITH BLEEDS ON IN DIFFERENT CONFIGS. NO OIL SMELL OR HOT OVERHEAT SMELL AT ANY TIME. APU OIL LEVEL CHECKS NORMAL. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.