As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT LOST VHF COMMUNICATIONS. AFTER FAILED ATTEMPTS TO CONTACT ATC THE PILOT THEN ENTERED "7600" INTO THE TRANSPONDER. THE ACFT PROCEEDED AND WAS GIVEN GREEN LIGHT TO LAND WITHOUT INCIDENT. THE AUDIO PANEL WAS REMOVED BY AVIONICS AND FOUND TO BE DEFECTIVE, NO VISIBLE EXTERNAL DAMAGE WAS OBSERVED. THE AUDIO PANEL HAS BEEN SHIPPED FOR REPAIR OR REPLACEMENT.