Plane collides with Blackhawk helicopter Washington DC

[Zaphod58]

 
Hmmm, thats is an interesting tidbit of information, so the CSMU is a data and cockpit voice recorder? This should answer some questions.

I know they have said the crew had substantial flight hours but how many night flights did they have under thier belts seems pertinent and how many times did they use this route? It sounds as if this was a unique training mission supposedly a doomsday evacuation scenario of political figures. So potentially the first time? Even though the military uses that route all the time for other purposes.

They have to be certified every year. This was her annual certification.

Correct. The CSMU serves as the DFDR/CVR in one module instead of two separate units.