As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK CREW REPORTED SMOKE IN THE COCKPIT.EMERGENCY DECLARED. AIRCRAFT LANDED UNEVENTFULLY AND WAS GROUNDED BY MAINTENANCE. MAINTENANCE FOUND SOURCE OF SMOKE TO BE CONNECTOR D109 ON CAPTAINS EHSI. MAINTENANCE REMOVED AND REPLACED AND REPINNED CONNECTOR D109 IAW BOEING SWPM 20-71-11. OPS CHECKED IAW B767 AMM 34-22-04. AIRCRAFT RELEASED FOR FLIGHT.