Any idea what to go google? I looked recently and was under the impression that build time was excluded.
The link that Mike posted above took me right to it. The FAA Dynamic Regulatory System, which used to be called FSIMS (Flight Standards Information Management System...a term that still floats about in places), is the new bible for FAA Inspector Guidance. It is a huge monster. The Volume 5, Section 2 covers what we are discussing. Mike's recommendation to look at the change bars was solid...led me right to it.
Paragraph 5-1134 Eligible to Test has the key info. Some key takeaways:
- 5-1134 C. PRESENTING DOCUMENTED EVIDENCE. States that those not presenting certificates of graduation from a Part 147 school or of JSAMTCC Military equivalent experience must go through a FSDO to receive authorization. (Note: while I had heard that an endorsement from an IA you worked under was required, I worked directly with the FSDO inspector, and did not have any additional letters of recommendation from IAs).
- The first Note under that sub para C references experience on amateur-built aircraft, a key ref for approaching a FSDO inspector.
5-1134 D. EVALUATING EXPERIENCE. D. 2) is the next critical ref for amateur-built experience that the inspector will use. It discusses what the inspector needs to "see" in terms of experience.
In the FWIW category, what I did was, after meeting the inspector at the show, and him saying "send me a synopsis, and I'll take a look", I started with a letter to the FSDO inspector that included a list of the 4 aircraft I have owned, and under each aircraft included a bulletized list of maintenance, repair, alteration and inspection projects that I had done over the years. I used 15-18 projects from each plane. I built a dropbox folder of about 300 photos of those projects (with me doing work in the photos in many cases), in the same order as the list, and provided him the link. I don't know if he looked at the dropbox account or not, but after that he sent me the Form 8610-2. On that form, under Section III. RECORD OF EXPERIENCE, I listed "XX months of maintenance, repair, alteration and inspection" of XYZ aircraft. There are 3 blocks in that section on that form, so the first three aircraft went on the form, and the 4th went on an additional sheet. On that additional sheet, I also included a spreadsheet of those various projects that broke each project down into months, or portions of months, of equivalent full time work on each project. In the end, it added up to 44 months (I think I was accurate and perhaps conservative...my wife says it was a lot more time in the hangar than that

).
Build time may perhaps be presented in a similar fashion, and build logs will be great supporting documentation for initial approach to an inspector, I would imagine. Each case will likely be slightly different, based on the combination of experience.
Hope this helps and encourages others here!
Cheers,
Bob