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Thread: IFR in experimental/homebuilt - new to homebuilt world

  1. #11

    Join Date
    Oct 2014
    Location
    Tehachapi, CA
    Posts
    123
    Quote Originally Posted by FlyingRon View Post
    Not quite Marc. If you don't fly in the class A, B, C, or within the mode C VEIL, OR above 10,000' you don't need a transponder.
    If you HAVE a transponder, you are required to have it on any time you are in any controlled airspace (which includes the blanket of class E that covers most of the lower 48).
    That was what I thought for a long time too, until Todd's post made me go look up 91.215. 91.215(b) says that you need a transponder in in the airspaces you list above. So that's in agreement. I also thought that if you had a transponder, it had to be on, and of course if it was on, it had to meet the requirements of 91.413. But for the life of me right now I can't find the requirement that "if you have a transponder in the plane, it must be turned on". Where is that? Am I going senile? 91.215(c) says that ... Oh, Crap - there it is... the "or in all controlled airspace" clause in 91.215(c) - missed that the first time checking.

    If you have a transponder, it must be on except in class G airspace, and if it's on, you need a 91.413 check.

    Thanks for making me look again...

    Sheesh.

  2. #12

    Join Date
    Jul 2011
    Location
    Chandler AZ
    Posts
    5
    Quote Originally Posted by Marc Zeitlin View Post
    Am I going senile? 91.215(c) says that ... Oh, Crap - there it is... the "or in all controlled airspace" clause in 91.215(c) - missed that the first time checking.

    If you have a transponder, it must be on except in class G airspace, and if it's on, you need a 91.413 check.

    Thanks for making me look again...

    Sheesh.
    And if you have an ADSB-out box, it must be on at all times, even Class G and when taxiing. (91.225(f))

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