I looked for a definition in the FARs and could
find none so I called FSDO in OK.city. They could not find a def. either so I
asked how they issued a cert. for N# size and said don't know write a letter to
FAA legal in I believe it was DC. for legal def. When I had my 320
inspected in 2000 by FAA he questioned my 3 in.# and I told him my
cruise was 179kt or less depending on endurance necessary. He asked what my max
speed was, I said don't know tell done testing but probably about 190kt TAS. He
issued my cert but said he would have to check on the #s. He called a few days
later and said approved for 3in.# but no explanation.
Gene Martin
LNC2/320 N522RG
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