Retrieve Master Control Program transmitter from Primary Helicopter | Main story Batman: AC Guide

Stay beside the helicopter you have scanned a moment ago and use the Grapnel Gun (RB) on it #1. Batman should automatically launch the line and grab one of the helicopter's skids. Afterwards you have to press X #2 and watch Batman obtain the Master Control Program in a very risky way. Listen out to the short conversation with Oracle, from which you will learn that the codes will let you reach the Miracle Tower by using the guards room beside the main gate.