As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DIVERTED TO IAD DUE TO SMOKE COMING FROM THE FORWARD CABIN AND LANDED UNDER AMBER ALERT. *S/D* RUN BOTH ENGINES WITH BOTH PACKS, RECIRCULATION FANS, NO ODOR OR SMOKE FOUND. CHECKED FORWARD OVEN VENT. REPLACED PRECAUTIONARY RIGHT AND LEFT RECIRCULATION AIR FILTERS.