As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT AND CREW RETURNING FROM A MEDICAL RUN WHEN A SUDDEN STRONG ODOR OF BURNING FILLED THE COCKPIT AND CREW AREA. NO SMOKE WAS NOTED IN THE AIRCRAFT. PILOT DECLARED AN EMERGENCY AND LANDED. AS OF TIME OF THIS REPORT AIRCRAFT IS GROUNDED WITH A MECHANIC AND PILOT ATTEMPTING TO ISOLATE PROBLEM AND NO DETERMINATION HAS BEEN MADE.