As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HOT FUME SMELL IN CABIN & COCKPIT. COMPLETED SMOKE/FUMES REMOVAL CHECKLIST AND FUME SMELL DISSIPATED. PERFORMED TROUBLESHOOTING PER 21-20-00 AND FOUND APU OIL LEAK BEING INGESTED. PERFORMED BURNOUT OF HIGH PRESSURE PNEUMATIC DUCTING PER AMM 21-20-02 NO HOT FUME SMELL REMAINS. REMOVED AND REPLACED APU IAW ALLEGIANT TASK CARD R0594902 LEAK AND OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.