What was found
RDD FLIGHT NR 2310: LEFT AND RIGHT MAIN LANDING GEAR AMBER DOORS AND LEFT RED GEAR UNSAFE LIGHT ILLUMINATED IN CRUISE FOR 2 SECONDS. FELT GEAR BEGIN TO CYCLE AND THEN RETRACT AND LIGHT WENT OUT. THEN THE DOOR AMBER LIGHT CONTINUED TO CYCLE AT 2 SECOND INTERVALS. AIRCRAFT LANDED WITHOUT INCIDENT AND WAS FERRIED TO PDX. MAINTENANCE PERFORMED THE FOLLOWING: LT AFT MLG DOOR MECHANISM WORN PARTS WERE REMOVED AND REPLACED. REF DHC-8 400 AMM TASKS 32-31-31-000-801 AND 32-31-31-400-801. PERFORMED OPS CHECK OF THE MLG EXTENSION/RETRACTION. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.