As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT CDU FAILED ACCOMPANIED BY A SMALL WISP OF SMOKE. SMELL AND SMOKE DISSIPATED, CIRCUIT BREAKER WAS PULLED. MAINTENANCE REMOVED LEFT CDU AND CLEANED DEBRIS. NO SMELL OR SMOKE IN AREA. SYSTEM OPERATION IS NORMAL. (2010-D1292) (DL76G102946)