Farnborough has rolled round again, and the AF447 mishap has raised its head again in the form of, "We've got the newest, the best and the greatest solution to knowing everything about your aircraft, including its death throes and final position". Only problem is that the solution costs money and the infrastructure for implementing it doesn't currently exist.
Bear in mind that real-time data streaming of flight parameters doesn't make the aircraft any safer; it's what may be learned quickly from an incident that provides an insight into the safety or otherwise of systems employed in similar aircraft.
Reference was made by
Lonewolf_50 to posts further back in this thread, so
post #289 will be a good place to start. Therein is a link to another thread on the subject where some attempts were made to cost the implementation of real-time data streaming.
mm43