What was found
UPON GEAR RETRACTION NOSE GEAR DOOR AMBER LIGHT ILLUMINATED. CYCLED GEAR PER EMERGENCY CHECKLIST AND RED UNSAFE LIGHT ILLUMINATED WITH NO ALTERNATE INDICATION. PERFORMED ALTERNATE EXTENSION ALL INDICATIONS NORMAL. FOUND PSEU TO HAVE NUMEROUS CODES TARGET 17, 14, 06, 10, 09, 14 SENSOR 14, 10, 09 AND CARD 40. REMOVED AND REPLACED PROXIMITY SYSTEM ELECTRONIC UNIT IN ACCORDANCE WITH MAINTENANCE MANUAL 32-61-50, OPS CHECK GOOD.