As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. STRONG ODOR OF BURNING OIL DETECTED AT FORWARD ENTRY AND ON FLIGHT DECK. REMOVED AND REPLACED WING SLAT AND UNDERWING BARREL HYDRAULIC PIPE ASSEMBLY IAW AMM 20-12-04. ACCOMPLISHED APU WASH AND PACK BURN OUT IAW MCM CARDS 49-97-11 AND 21-92-12. LEAK AND OPERATIONAL CHECK GOOD.