What was found
APPROXIMATELY 20 MINUTES INTO THE FLIGHT PILOT SUSPECTED AN ELECTRICAL BURNING ODOR. HE NOTICED SOME SMOKE COMING FROM UNDER INSTRUMENT PANEL. AT THAT TIME HE COMPLETED THE MEMORY ITEMS FOR (ELECTRICAL SMOKE OR FIRE). AFTER 1 TO 2 MINUTES SMOKE AND ODOR DISSIPATED. AFTER REGAINING RADIO COMMUNICATIONS WITH CENTER, PILOT DECLARED AN EMERGENCY AND ASKED FOR VECTORS TO NEAREST AIRPORT. PILOT ACCEPTED VECTORS TO K3BS. FLIGHT LANDED UNEVENTFULLY. RADIO COOLING FAN FOUND RUBBING BETWEEN FAN AND HOUSING. REPOSITIONED FAN INSPECTED SIMILAR COOLING FANS ACROSS FLEET. (K)