PurposeUSED TO HOLD THE RUDDER OR THE ELEVATOR AT FULL RIGHT POSITION DURING REMOVAL OR INSTALLATION OF A RUDDER POWER CONTROL UNIT (PCU) OR OF AN ELEVATOR PCU.Airplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 