What was found
AIRCRAFT WAS GROUNDED: FLT. ATD REPORTED FUMES ODOR FUEL SMELL. SEVERITY MILD/MODERATE CATEGORY C. ONCE QUICK ACTIONS ITEMS COMPLETED SMELL GOT A LITTLE BETTER. MAINTENANCE TROUBLESHOT APU AND FOUND OIL LEAKING INTERNALLY FROM AIR INTAKE. INTERNAL IMPELLAR AND SHAFT HAD VISIBLE OIL COMING FROM THEM. STATIC APU LEAKED OIL AT LEAST A QUART OF OIL INTO AIR INTAKE SYSTEM AND SUBSQUENTLY INTO THE BLEED AIR SYSTEM. NO EXTERNAL FACTOR IN CAVITY OUTSIDE OF APU SHOWED OIL, ONLY OIL COMING FROM INSIDE AIR INTAKE CAVITY OF APU. APU REQUIRES CHANGE. SUPPLEMENTAL INFORMATION: MAINTENANCE REMOVED AND REPLACED APU IAW JOB CARD 26L310490050. (CLOSED)