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*Message: A website user has reported the following comment on AVweb Insider. "The usual figure given is a quarter to a third of the total cost of the airplane goes into cert related expenses. This is difficult to pin down accurately, leading me to believe it could be as little as 10 percent. Most of this will apply to the development of new models." You can view the comment on the site by going to http://www.avweb.com/blogs/insider/A-Visit-to-Zulu-220154-1.html#29904.

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