What was found
AT 270 KIAS AND APPROXIMATELY 15K FEET MSL THE FIRST OFFICER AND I FELT A SLIGHT SHUDDER, LASTING ONE SECOND. LOOKED AT THE PANELS AND SAW THE RIGHT MAIN GEAR DOOR LIGHT (AMBER) ILLUMINATED. THE LIGHT ALMOST IMMEDIATELY EXTINGUISHED. THE REMAINDER OF THE FLIGHT WAS UNEVENTFUL. COMPLIED WITH INSPECTION AFTER OPERATION AT MORE THAN THE MAXIMUM GEAR OPERATION SPEED IAW AMM TASK 05-50-31-210-801 STEPS 1, 2, 3 AND 4-A-(1)-(E) THROUGH (J). NO DEFECTS NOTED AT THIS TIME. INSPECTED ALL LANDING GEAR FOUND NO OBVIOUS DEFECTS, MAIN GEAR LOCK PINS ARE INSTALLED AND NOSE GEAR LOCK ENGAGED. FERRY FLIGHT. ADJUSTMENT OF LT GEARDOOR PROX SENSOR AND ADJUSTED READING IWA 32-61-06-830-801. RETURN TO SERVICE.