What was found
FL 410 '160 MILES FROM ICT SMELLED ELECTRICAL SMOKE IN COCKPIT, AFTER 15 MINUTES SMOKE WENT AWAY. AT 240 ODOR OF SMOKE AGAIN. FOUND LIGHT OVERRIDE SWITCH STUCK. NO ICAS MESSAGES AND NO STATUS MESSAGE, NO C.B. POPPED. COMPLIED WITH FIM 21-00-01 PGS 101 THRU 110,ONLY ITEM FOUND WAS LIGHT OVER RIDE SWITCH BURNED. REPLACED SAME PER WD 33-11-21 PG 1,ALL OPS CHECK GOOD. ONLY ITEM LEFT IS TO RUN ENGINES AND PNEUMATIC SYSTEMS. RAN BOTH ENGINES FOR 15 MIN, AND RAN EVERY SYSTEM ON ACFT. TURNED LIGHT OVER RIDE ON AND OFF SEVERAL TIMES. NO EVIDENCE OF ANY SMOKE. OK FOR SERVICE.