As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1268, DFW - PHL - NOXIOUS FOUL ODOR IN AFT CABIN SHORTLY AFTER TAKEOFF RETURNED TO DFW AFTER LANDING AND DEPLANING THE ODOR PERSISTED IN THE AFT CABIN. MAINTENANCE ACCOMPLISHED RIGHT ENGINE CHANGE PER JC 43L40071001. NO ODORS NOTED ON ENGINE RUNS.