What was found
SMALL PUFF OF GREY SMOKE EMERGED FROM FRONT, LOWER LEFT CORNER OF INSTRUMENT PANEL WHILE IN CRUISE FLIGHT. CREW ALSO DETECTED A "BURNING ELECTRICAL" ODOR. NO FLAMES WERE OBSERVED. ELECTRICAL ITEMS WERE SHUTDOWN AND ACFT SUCCESSFULLY LANDED WITHOUT FURTHER INCIDENT. NO ADDITIONAL SMOKE OBSERVED AFTER INITIAL SIGHTING. INSPECTION AND GROUND RUN FOUND AMP METER INOPERATIVE. TROUBLESHOOTING DISCOVERED FAILURE OF WIRING CONNECTION BEHIND AMMETER GAUGE AT CIRCUIT BOARD CONNECTOR POSITION B5. REPAIRED AS REQUIRED.