As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ENROUTE, HAD ELECTRICAL BURNING ODOR FOLLOWED SHORTLY BY NVG INSTRUMENT POST LIGHTS TURNING OFF. AIRCRAFT LANDED. MECHANIC FOUND RHEOSTAT INOPERATIVE AND BURNED ON ONE SIDE. REPLACED RHEOSTAT IN THE OVERHEAD CIRCUIT BREAKER PANEL.