As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED FUMES IN THE COCKPIT. ACFT LANDED UNEVENTFUL AT DESTINATION AIRPORT. ODOR ORIGINATED FROM NR 1 ARCDU ALSO FELT HOT TO THE TOUCH. CREW DECLARED AN EMERGENCY. NR 1 ARCDU REPLACED. ARCDU AND OTHER ACFT SYSTEMS WILL BE POWERED AND MONITORED TO CONFIRM ARCDU WAS THE CAUSE.