PurposeUSED TO PROVIDE AN EXTENSION OF THE HYDRAULIC GROUND SERVICE PRESSURE AND RETURN PORTS FOR THE LEFT AND RIGHT HYDRAULIC SYSTEMS TO PREVENT DAMAGE TO AIRPLANE COMPONENTS AND CHAFING OF HYDRAULIC LINESAirplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 