What was found
DURING FLIGHT 3183, LEFT INTAKE CAUTION LIGHT ILLUMINATES, MOVING POWER LEVER WILL EXTINGUISH LIGHT FOR APPROXIMATELY 2 MINUTES THEN COMES ON AGAIN. AIR RETURN TO MSP. MAINTENANCE REMOVED AND REPLACED DEICE CONTROL MODULE (LT) P/N44730-501, S/N OFF A0072, S/N ON A00301. OPS CHECK GOOD.