As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6590 - IAD-RDU - DURING CLIMB-OUT RETURNED TO IAD DUE TO THE CREW REPORTING FUEL SMELL IN COCKPIT. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE WATER SEPARATOR SOCK AND THE COLD AIR UNIT. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. REFERENCE NR VTZA95256.