As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VISUAL SMOKE SEEN COMING OUT OF AUDIO MANAGEMENT UNIT IN AVIONIC BAY DURING MX TRANSIT. DISCONNECTED UNIT FROM RACK, FOUND BOTH CB`S POPPED OUT AT P11 PANEL IN COCKPIT. R & R AUDIO MANAGEMENT UNIT M8035 IAW AMM 23-51-05-004-028 404-029. PERFORMED OPERATIONAL CHECK IAW AMM 23-51-00-235-024-001. SYS CHECKED NORMAL.