As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3981 - JUST AFTER LIFTOFF, SMOKE APPEARED IN THE COCKPIT. INSPECTED CENTER PEDESTAL WITH NO EVIDENCE OF DAMAGED WIRES. INSPECTED ALL ELECTRICAL COMPONENTS AND RELAY CONTACTORS IN AVIONICS BAY WITH NO DISCREPANCIES NOTED. REPLACED NR 2 RTU FOR PRECAUTIONS. OPS CHECK GOOD.