What was found
AFTER T/O LAX, RT MAIN GEAR INDICATED UNSAFE AFTER RETRACTION ON BOTH PRIMARY AND SECONDARY INDICATORS. RECYCLED PER QRH, NO CHANGE. DUMPED FUEL AND RETURNED FOR UNEVENTFUL LANDING. CHECKED: BUNGEE CYLINDER, EXTENSION RETRACTION ADJUSTMENT TEST, TARGET AND PROXIMITY SENSOR GAPS, BLED TRIM CYLINDER, TRUCK PIVOT RELATIVE MOVEMENT, LUBED GEAR, REPLACED RT GEAR DOOR ACTUATOR FOR BY-PASSING AND LEAKING. ALL ACCOMPLISHED AS PER MM. TEST FLEW AIRCRAFT WITH 3 LANDINGS. OK RETURNED TO SERVICE.