As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 1141 - FOUND SMOKE IN COCKPIT WHILE SITTING AT THE GATE. FOUND ARCING ON LANDING LIGHT SWITCH DUE TO DIRT CONTAMINATION CLEANED SWITCH CONTACTS COULD NOT DUPLICATE ORIGINAL PROBLEM. NO OTHER DEFECTS NOTED AT THIS TIME LIGHTING. OPS CHECK GOOD. (M)