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jbhart(at)onlyinternet.ne
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 Posted: Sun Mar 18, 2007 10:11 am Post subject: GA & Amateur Built Aircraft Engine Failure Rates |
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Old Subject: Re: Re: HKS Engine Report
At 08:12 AM 3/18/07 -0700, you wrote:
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| Quote: | Engines do quit, and much more often in experimental - ultralight aircraft.
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Mike, & Kolbers,
I checked the FAA Accident Database & Synopses and I ran a few queries where
the incident or accident was caused by "engine failure". I found that for
the time period between 1/1/2002 to 3/18/2007 the following:
For experimental aircraft there 24 reports with three accidents causing the
death of 4 people.
For general aviation there were 263 reports with 78 accidents causing the
death of 156 people.
| Quote: | From the Bureau of Transportation Statistics, I found that the latest data
available is 2004.
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Under the General Aviation category there were 146,613 single engine piston
engine aircraft. Under the Amateur Built category there were listed 19,165
aircraft.
So assuming all things equal there where 7.65 times more GA single engine
piston powered general aviation aircraft registered than amateur built
aircraft. But in the sweep of FAA accident Database indicates GA aircraft
were involved in accidents/incidents at rate eleven times greater that
amateur built aircraft. In those cases were death took place the GA rate
was 26 times higher that amateur built. And for numbers killed GA was 39
times greater than amateur built.
To be fair, most GA aircraft fly faster and carry more passengers than
amateur built aircraft so one can expect a GA aircraft engine failure to
produce greater consequences. Also one can say that GA aircraft fly more
hours per year than do amateur aircraft. But, based on the available data,
it is a stretch to say that amateur aircraft engine failure is more likely
to happen than with GA aircraft.
I could find no reliable data for ultra light vehicle engine failure.
The data sources are listed below:
http://www.bts.gov/publications/national_transportation_statistics/html/table_01_13.html
http://www.ntsb.gov/ntsb/query.asp
Jack B. Hart FF004
Winchester, IN
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JetPilot
Joined: 10 Jan 2006
Posts: 1246
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| Posted: Sun Mar 18, 2007 2:20 pm Post subject: Re: GA & Amateur Built Aircraft Engine Failure Rates |
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Jack,
Your analysis of the figures is correct, but I totally disagree with your conclusion. You did not take into account that almost all General Aviation engine fialures are are reported, while most ultralight - experimental engine failure go unreported.
Just looking at the NTSB numbers of REPORTED accidents with injurys is useless. Anyone that thinks exprimental - ultralight engine failures is lower than certified General Aviation is very misinformed about the nature of the machines we are flying.
Mike
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"NO FEAR" - If you have no fear you did not go as fast as you could have !!!
Kolb MK-III Xtra, 912-S |
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Steven Green
Joined: 05 Feb 2006
Posts: 118
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| Posted: Sun Mar 18, 2007 4:53 pm Post subject: GA & Amateur Built Aircraft Engine Failure Rates |
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while most ultralight - experimental engine failure go unreported.
Mike,
If I read Jack's study correctly, He only used "engine failures" that
resulted in a fatality and only compared GA to experimental. I doubt there
are many fatal accidents in experimentals that go unreported.
Steven
do not archive
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