In 2003, mechanical and maintenance were the major cause
of 15% of all GA accidents, and 7.5% of fatal accidents
Typically,
one mistake or failure—a precipitating event—leads
to another in a cascading series of malfunctions and mistakes,
culminatiing in an accident. This is called the accident
chain.
By any calculation, the average pilot could
fly many, many lifetimes without having an accident of
any sort, let alone
a much more rare fatal mishap.
In 2003, electrical/ignition
failures accounted for 3% of all accidents, and 0% of fatal
accidents.
2004 Nall Report
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