As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2086 - DIVERTED DUE TO RT AUTOPILOT DISCONNECTED, FOLLOWED BY STRONG ACRID SMELL IN FLIGHT DECK AND FORWARD PART OF CABIN. PERFORMED NO GO ODI PREVENTION PROCEDURES. COULD NOT DUPLICATE FUMES OR ODORS. FOUND LT FCC FAILED. REPLACED FCC SYSTEM OPERATION IS NORMAL.