As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O'S AIRSPEED IND, AND F/O`S ALTIMETER WARNING FLAGS IN VIEW. F/O`S AIR SPEED NEEDLE CYCLED 0 TO 360 TO 0, EVERY 2 MINUTES. DURING LAST 20 MINUTES OF FLIGHT F/A REPORTED BURNED ELECTRICAL SMELL IN CABIN. REMOVED AND REPLACED NR 2 ADC PER MM.