Is it possible to obtain accident information from any personal handheld digital device found at the scene?

 

Explain and provide an example. Data Capture Systems:

 

Briefly explain the differences and capabilities between various data recording/capture systems. Compare and

 

contrast the value between onboard capture systems and down-linking data systems.

 

Why are such systems usually NOT mandated on private general aviation aircraft​‌‍‍‍‌‍‍‍‌‍‍‍‌‌‌‌‌‌‍‍​?