As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SMOKE NOTED AND SMELT COMING FROM BEHIND INSTRUMENT PANEL DURING DESCENT. BATTERY AND BOTH GENERATORS WERE SHUT OFF AND THE SMOKE STOPPED AVIONICS MASTER RESELECTED ON AND SMOKE OBSERVED AGAIN INVESTIGATION FOUND THE GPS RECEIVER CIRCUIT BOARD HAD OVERHEATED IN ONE AREA. THE BOARD APPEARS TO HAVE GROUNDED TO THE CASE. THE MANUFACTURER IS INVESTIGATING ALONG WITH THE OPERATOR. MORE INFO TO FOLLOW.