What was found
UPON GEAR RETRACTION, LEFT FORWARD GEAR DOOR CLOSED AND THEN RE-OPENED, LEFT AMBER DOOR LIGHT REMAINED ILLUMINATED. THE CREW FOLLOW EMERGENCY CHECKLIST AND ADVISED THE AIR TRAFFIC CONTROL ACFT RETURNING TO FILED. AN EMERGENCY WAS NOT DECLARED. UPON EXTENSION THE AMBER LIGHT EXTINGUISHED AND ALL GREEN ILLUMINATED. THE AIRCRAFT LANDED SAFELY. FOUND LEFT FORWARD GEAR DOOR MISS-RIGGED. RE-ADJUSTED DOOR AND PERFORMED GEAR SWINGS, ALL CHECKS GOOD.