As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN`S AUDIO CONTROL PANEL FAILED IN FLIGHT, OBSERVERS AUDIO CONTROL PANEL WAS ALREADY DEFERRED. CREW DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE R & R CAPTAINS AUDIO CONTROL PANEL AND R & R OBSERVERS AUDIO CONTROL PANEL IAW AMM, OPS CHECKED GOOD. THE ACFT WAS RELEASED FOR SERVICE.