As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CAPTAINS CDU STARTED TO MAKE LOUD CRACKING RATTLING NOISES, THEN SMOKE STARTED TO EMIT FROM THE CDU. THE FMCS 1 CB THEN POPPED. CONFIRMED CDU CAPTAINS SIDE CAUSES BURNING ODOR. R & R CAPTAINS CDU IAW AMM 34-61-01-401. OPERATIONS CHECK NORMAL IAW OTHER REFERENCES AMM 20- 60-01 & AMM 5-51-26. ACFT OK FOR SERVICE. ROTABLE PARTS CHANGE WAS INDICATED. TT 1683381, SN OFF 03461 DISPLAY, FLIGHT OFF 29-3461-9-0010 3467 ON 29-3461-9-0010 3750.