As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2003. WHILE IN CRUISE FLIGHT, AUDIO CONTROL PANEL( CAPTAINS SIDE) HAD A HIGH PITCHED SQUEAL FOLLOWED QUICKLY BY IT FAILING. ACCOMPLISHED NAP LOSS OF COMMUNICATIONS CHECKLIST. WORKED AS STATED PER CHECKLIST WITH BACKUP BUTTON PUSHED OUT. DIVERTED AND ACCOMPLISHED UNEVENTFUL LANDING. REMOVED FROM SERVICE. REMOVED AND REPLACED PILOT DAP. REF E-175 AMM TASKS 23-51-01-000-801-A AND 23-51-01-400-801-A. OPS TEST GOOD. RETURNED TO SERVICE.