As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO IAD DUE TO SMOKE IN COCKPIT FROM CAPTAINS OVERHEAD PANEL AFT OF NR 4 EYEBROW WINDOW. *S/D* MAINTENANCE REPORTED FINDING CAPT''S NR 4 EYEBROW WINDOW ARCHING AT TERMINALS. CAPT''S NR 4 WINDOW WAS REPLACED. SHOP FINDINGS CONCUR, EVIDENCE OF ARCHING. NO FURTHER PROBLEMS REPORTED.