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28 Mar 2024, 15:46 [ UTC - 5; DST ]


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 Post subject: Re: Cessna 408 SkyCourier Type Certified 3/14/2022
PostPosted: 16 Mar 2022, 14:57 
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Username Protected wrote:
On one hand, the number of people exposed to significant aviation noise in the United States has declined 90% from roughly 7 million in the 1970s, to just over 400,000 today. This also occurred as total enplanements increased by nearly a factor of five, from 200 million in 1975 to more than 850 million today.


So, to be clear - the problem they are solving is the diminishing returns left from 90% reduction in noise. And to top it off, the complainers seem to be people who live near airports. Shocking that you hear airplanes and live near an airport. Perhaps a study should be commissioned to figure out the correlation there.


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 Post subject: Re: Cessna 408 SkyCourier Type Certified 3/14/2022
PostPosted: 18 Mar 2022, 15:10 
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Interesting. When I was at Cessna, I participated in both DOA (predecessor to ODA) projects for Part 23 airplanes and was a Part 25 DER. The representatives did do design work, typically at the Group Leader level, and the administrative group was about five people.


Representatives (UMs) are not prohibited from doing design work, but in all practicality, they have no time to do so. They may have input into a design, in fact, that's encouraged, but younger engineers typically do the grunt work. They can do work and sign as company rather than UM. There are UMs that do their own analysis, sign, and approve their own compliance reports, but that is the exception rather than the rule. Typically the company engineers are supposed to show compliance, and the UM is exclusively finding the compliance. There are already barely enough UMs available for the number of projects in work, so that's why they don't have much time for anything else.

The ODA office has definitely grown. There is an administrator, 2 deputy administrators, regulatory compliance leaders for each discipline, then a bunch of certification program managers and certification engineers. To think that people wonder why airplanes cost so much.


I was going to tell a few certification stories, but thought better because I like my retirement check and don't like subpoenas.

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 Post subject: Re: Cessna 408 SkyCourier Type Certified 3/14/2022
PostPosted: 09 May 2022, 18:40 
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