What was found
(CAN) AIR TURNBACK DUE TO FORWARD BAGGAGE DOOR WARNING. LINE MAINTENANCE INVESTIGATION REVEALED DAMAGE TO THE GUIDE LUGS OF THE DOOR MECHANISM INNER SHAFT. ADDITIONALLY SPIGOT RETENTION HARDWARE ON OVER CENTER MECHANISM FOUND LOOSE AND WORN, SPRING ON MAIN SHAFT COMPRESSED AND NOT APPLYING CORRECT TENSION. INNER SHAFT AND SPRING REPLACED ALONG WITH WORN HARDWARE AS REQUIRED. INNER HANDLE, OUTER HANDLE, VENT MECHANISM AND OVER CENTRE MECHANISM ASSEMBLED AND RIGGED IAW THE AMM. ACFT RETURNED TO SERVICE.