As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED VERY STRONG FUMES IN THE AIRCRAFT COCKPIT AND IN CABIN. MAINTENANCE FOUND OIL RESIDUE ON THE APU AND THE INLET AREA AND REMOVED THE OIL RESIDUE. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS BEING NOTED.