As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING CRUISE STRONG ACRID ODOR FROM FIRST OFFICERS SIDE FLIGHT CONTROL UNIT WITH PLUME OF SMOKE (FIRST OFFICER SAW SMOKE, CAPTAIN DIDN'T). A MOMENTARILY. ACRID BURNING SMELL LASTED 1.5 MINUTES AND ENDED. MAINTENANCE FOUND THE ELECTRICAL CLOCK WAS TRIPPING THE CIRCUIT BREAKER AND REPLACED THE CLOCK PER AMM 31-21-21. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.