PurposeUSED TO EXTEND FIRING PIN TO ASSIST IN THE REMOVAL AND INSTALLATION OF THE SAFETY PIN DURING OXYGEN GENERATOR DEACTIVATION AND ACTIVATIONAirplane737, 747, 757, 767, 777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777FUsage CodeMAINTENANCE 