What was found
GEAR UNSAFE LIGHT REMAINED ILLUMINATED WITH THE GEAR UP, RIGHT GEAR DOOR INDICATED 'NOT LATCHED'. CYCLED GEAR TWICE, NO CHANGE. ACCOMPLISHED ALTERNATE UPLATCH PROCEDURES. LIGHTS REMAINED ON THROUGHOUT FLIGHT. ADJUSTED RIGHT MAIN LANDING GEAR DOOR SENSOR TARGET STOP IAW DC8 MM 32-60-00, OPS CHECKED GOOD.