As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 4289 THE CREW REPORTED THAT BELOW 10000 PACKS PRODUCING A STRONG OIL SMELL WITH COMPLAINTS FROM BOTH CREW AND PASSENGERS. THE AIRCRAFT LANDED AT IAH WITH NO INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND REMOVED AND REPLACED THE NUMBER ONE ENGINE. OPERATIONAL CHECKS WERE COMPLETED SUCCESSFULLY AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE ON 10/24/17.