As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM TOL-DFW - THE FLIGHT CREW NOTED A FAINT SULPHUR LIKE ODOR PRESENT AT TIMES IN COCKPIT, POSSIBLY COMING FROM THE COCKPIT LIGHTING. ON THE GROUND IN DFW, THE COCKPIT LIGHTS WERE OPERATED AND INSPECTED. THE COCKPIT LIGHTING SYSTEMS OPERATED NORMALLY AND DID NOT PRODUCE AN ODOR. (M)