As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH-FLIGHT 3876 FROM OKC TO IAH, THE CREW REPORTED AN EXTREMELY STRONG EXHAUST SMELL WHEN ANTI-ICE WAS ON IN FLIGHT. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED THE NUMBER TWO ENGINE, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.