As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6102 IAD-BOS DIVERTED TO JFK, ELECTRICAL SMOKE RE-APPEARED DURING FLIGHT. NO SYSTEM FAILURE NOTED. FOUND ODOR COMING FROM THE RECIRCULATING FAN VENTS IN THE COCKPIT. REMOVED AND REPLACED RECIRCULATING FAN PER AMM 21-24-01. OPS CHECK OK.