As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ENROUTE TO A SCENE, SMELLED & WITNESSED SMOKE COMING FROM THE PILOTS AUDIO PANEL LOCATION. THE ICS WAS INOPERABLE, HOWEVER HE COULD STILL TRANSMIT ON THE VHF RADIOS. ABORTED THE MISSION & LANDED AT THE NEAREST AIRPORT WHICH WAS ONLY 5 MINUTES AWAY. INSPECTED THE ACFT & CONFIRMED THE PILOTS AUDIO PANEL TO BE THE FAULT. A REPLACEMENT WAS RECEIVED & INSTALLED. THE PILOTS ICS & ACFT WERE THEN RETURNED TO SERVICE.