As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR IN CABIN AND THROUGH OUT THE ACFT. INSPECTED THE NR 1 & 2 ENGINES FOR OIL QTY & LEAKS, NO LEAKS NOTED, OIL QTY OK. INSPECTED THE APU AND FOUND APU TO HAVE AN ACTIVE OIL LEAK FROM AFT DRAIN MAST TUBE. APU OIL LEVEL APPROXIMATELY 1/2 QT LOW. PULLED AND COLLARD CIRCUIT BREAKERS L41 & L42. OPEN.