As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRIEF ODOR OF ELECTRICAL SMOKE OCCURED IN FLIGHT ACCOMPANIED BY FMS NR 2 FAILED, INCLUDING BLANK SCRATCH PAD. SMOKE IMMEDIATELY DISSIPATED. TROUBLESHOOTING FOUND NR 2 FMS CDU AT FAULT. REMOVED AND REPLACED NR 2 CDU IAW MM 34-60-01. OPS CHECKED NORMAL.