Complex Event Processing and Big Data in Aviation for Monitoring/Registering Critical Situations and Crashes

I’m guessing the suitability of leveraging CEV and Big Data to provide real time data in addition to the official “blackbox” registers installed in aircraft for obtaining critical information in case of crashes and critical situations. The costs incurred for locating the registers is likely to be very high, mainly when the plane falls down in oceans, mountains and places with difficult access or when the energy impact is so high that the register becomes unusable.