What was found
DTW - FOUND LEFT MAIN GEAR UNSAFE LIGHT ON AFTER GEAR RETRACTION-RECYCLED REMAINED IN UNTIL OUT AT 13000 FEET, NO OTHER ABNORMAL INDICATION SWITCH ON APPROACH CYCLED GEAR NO PROBLEM WITH LIGHTS, ALL NORMAL. T/A FOUND D1-26 L MAIN GEAR UP AND LATCHED SENSOR FAULTY, REMOVED AND REPLACED SENSOR. OPS CHECK NORMAL. (M)