As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI FOR TAKEOFF. SPARK AND FUMES WERE NOTED BY CREW IN FRONT OF THE COPILOT PANEL UNDER TEMP GAUGE. MAINTENANCE INSPECTED AIRCRAFT AND DETERMINED THAT THE ELECTRICAL TEST PORTS IN COCKPIT HAD LOOSENED AND CONTACTED EACH OTHER THUS CAUSING THE ARCING. MAINTENANCE TIGHTENED THE TEST PORTS AND NO FURTHER PROBLEM WAS PRESENT.