What was found
PDX - THE RT YELLOW MAIN GEAR DOOR LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. CYCLED THE GEAR HANDLE DOWN LEFT MAIN AND NOSE GEAR WENT DOWN AND LOCKED. RT MAIN RED UNSAFE LIGHT REMAINED ILLUMINATED WITH NO GREEN DOWN AND LOCKED AND INDICATED UNSAFE BY ALTERNATE MEANS. REMOVED OBSTRUCTION FROM RT FORWARD GEAR DOOR HINGE ARM PATH. GEAR OPERATIONAL CHECK GOOD. AIRCRAFT WAS RETURNED TO SERVICE.