PurposeUSED TO PREVENT THE BALL NUT FROM MOVING DOWNWARDS WHEN THE STABILIZER JACKSCREW IS DISCONNECTED FROM STABILIZER. THIS TOOL IS ALSO USED IN CONJUNCTION WITH THE STABILIZER ACTUATOR STAND.Airplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 