What was found
AFTER TAKEOFF ON LANDING GEAR RETRACTION, THE RIGHT MAIN LANDING GEAR FORWARD DOOR REMAINED IN THE OPEN POSITION. AIRCRAFT RETURNED TO THE FIELD AND ACCOMPLISHED AN UNEVENTFUL LANDING. INSPECTED AND FOUND SAFE FOR FERRY FLIGHT FROM SEA TO PDX. IN PDX, FOUND MISSING BOLT AND BUSHING ON GEAR DOOR ACTUATOR ROD. REPLACED BOLT AND BUSHING. PERFORMED RIGGING AND OPERATIONAL CHECK OF SYSTEM, CHECKS GOOD.