What was found
SHORTLY AFTER TAKEOFF, STRONG OIL FUMES WERE DETECTED THROUGHOUT THE AIRCRAFT. AIRCRAFT RETURNED TO MSP. GROUND MAINTENANCE FOUND OIL IN THE APU DUCTS. THE APU WAS REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SHORTLY AFTER TAKEOFF, STRONG OIL FUMES WERE DETECTED THROUGHOUT THE AIRCRAFT. AIRCRAFT RETURNED TO MSP. GROUND MAINTENANCE FOUND OIL IN THE APU DUCTS. THE APU WAS REPLACED.