Pick any two FAR Part 121 accidents from the NTSB website and contrast the accident reports. Focus on similar or different challenges presented to the accident investigators during their field investigation and evidence collection based on crash site differences.
Using the same two accident reports you picked above, compare and contrast the information collected from the CVR, FDR, ATC Recordings, and other electronic media in the accidents. What challenges were there in collecting electronic evidence? How important was electronic evidence in determining the cause(s) of the accidents?