What was found
PHL - FLT CREW REPORTED TO MAINTENANCE THAT A HAZE AND AN ODOR OF OIL WAS PRESENT IN THE CABIN AND COCKPIT. APPEARS THAT THE APU PNEUMATICS SMOKES THE CABIN UP WHEN RUNNING. MAINTENANCE REMOVED GARBAGE FROM THE APU INTAKE. RAN APU FOR 2 HOURS. NO ODOR NOTED. APU OIL LEVEL CHECKS. S/D MAINTENANCE CONFIRMED THAT THE APU HAS AN INTERNAL OIL LEAK. DURING T/S PROCESS THE APU USED APPROXIMATELY ONE QUART OF OIL WITHIN ONE HOUR OF OPERATION. AIRCRAFT WAS RELEASED WITH THE APU ON MEL. APU IS PROGRAMMED FOR REPLACEMENT. (M)