What was found
(CAN) RADIO`S, HSI AND TCAS ON LT SIDE ONLY FLASH ON ANS OFF AND FAIL. SOMETIMES OCCUR WHEN BLEED HEAT IS SELECTED ON/OFF. WHEN MX WENT TO LOOK AT IT THEY COULD DETECT AN ODOR OF ELECTRICAL BURNING AND FOUND THE LT ESSENTIAL BUSS TIE SWITCH WAS CRACKED AND BURNED AT A ATTACHMENT LUG. REPLACED SWITCH AND AIRCRAFT RELEASED TO SERVICE. THIS SDR RELATES TO THE FOLLOWING SDR 20100303004 WHICH ALSO RELATES TO 2 OTHERS AS INDICATED IN THE MENTIONED PAST SDR.