What was found
(CAN) WHEN GEAR SELECTED DOWN NO GREEN LIGHT FOR NOSE GEAR DOWNLOCK. ALSO, THERE WAS NO RED UNSAFE LIGHT OR ANY HYD ON ANNUNCIATOR LIGHT. GEAR RECYCLED, STILL THE SAME AND BULBS OK. GEAR BLOWN DOWN. AIRCRAFT LANDED OK. FOUR HOURS LATER THE GREEN LIGHT WAS ON. SUBMITTER SUSPECTS COLD SOAKING OF SWITCH. SWITCH REPLACED. PART TC: 1,471.