As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 13000 FT GOT ODOR OF ELEC SMOKE THEN SAW SMOKE BILLOWING UP FROM COPILOTS LT LEG. RETURNED TO LAS. FOUND EVIDENCE OF F/O'S FMS MCDU BURNT. ASSOCIATED FMC MSG MCDU BLANK. INSPECTED AREA AND ASSOCIATED HARNESSES FROM FWD E AND E COMPT AND PEDESTAL. REPLACED F/O MCDU. ALL CHECKS NORMAL.