Typically, the NTSB reports on flight risks after reviewing a set of relevant accidents, but for its latest report, released last week, the board has implemented a new methodology. The new "case-control" statistical-analysis approach was used in a study of GA weather-related accidents, comparing a group of accident flights to a matching group of non-accident flights in an effort to identify patterns of variables that distinguish the two groups from each other. The advantage, the NTSB says, is that instead of focusing on factors that accidents have in common -- and possibly being misled by characteristics common to most pilots and flights -- it identifies characteristics that set accidents apart and contribute to their occurrence.
http://www.avweb.com/newswire/11_49a/leadn...tml?CMP=OTC-RSS
http://www.avweb.com/newswire/11_49a/leadn...tml?CMP=OTC-RSS
