As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. CREW REPORTED ODOR IN THE CABIN. ACCOMPLISHED TASK CARD 26L00021001 AND FOUND OIL IN THE APU PLENUM. SUPPLEMENTAL INFORMATION: REMOVED AND REPLACED FUEL CONTROL UNIT, IAW AMM 49-32-11, LEAK CHECK GOOD. NO OIL LEAK NOTED AT THIS TIME. FUEL CONTROL UNIT OPERATIONAL CHECK GOOD. ACCOMPLISHED J/C 26L00021004.