What was found
SEA - RIGHT DOOR AMBER CAUTION LIGHT ON AND OFF DURING CLIMB, CRUISE, DESCENT. RIGHT AND LEFT RED GEAR UNSAFE LIGHTS ALSO CAME ON AND OFF DURING SAME DURATION ABOUT 2-3 SECONDS ON, OFF MOST OF THE TIME, CAME ON ABOUT 8 TIMES DURING 55 MINUTE FLIGHT. AIRCRAFT HAD REGULAR SHORT SHUDDERS ABOUT 1 SEC, DURATION DURING FLIGHT. NOT TIMED WITH LIGHTS. LANDING UNEVENTFUL IN SEA. FERRIED TO PDX FOR REPAIRS. REMOVED AND REPLACED RT MLG DOOR MECHANISM IAW -8 400 AMM TASK 32-31-31-000-801 & 32-31-31-400-801. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.