What was found
AFTER TAKEOFF FOR FLT 519, ATL-ATL, AIR RETURN, WHILE EXECUTING THE 'GEAR UPLATCH CHECK', THE 'RIGHT GEAR UNSAFE' LIGHT CAME ON COUPLED WITH THE 'GEAR DOOR OPEN' LIGHT. FOUND SPRING ON RT MAIN GEAR DOOR UPLATCH BROKEN. REMOVED AND REPLACED SPRING GEAR DOOR AND LIGHTS. OPS CHECK OK.