What was found
CREW REPORTED ON DEPARTURE, ROD GEAR DOOR NOT LATCHED LIGHT ILLUMINATED. CYCLED GEAR AND PERFORMED UPLATCH CHECK. LIGHT WENT OUT. HOWEVER, LT MAIN AMBER ALTERNATE GEAR DOOR LIGHT REMAINED OUT, UNTIL APPROACH IN TURBULANCE, THEN AMBER LIGHT WENT OUT. REMOVED AND REPLACED LT GEAR ALTERERNATE SWITCH. C/W ADJ AND TEST PROCEDURES OF POS. AND WARNING SYS. PER DCE MM 32-60-00, PG 203, SYS OPS NORMAL.