Transponder change question

[cbennet12]

I am planning to swap my GTX327 for the SV261. My last 411/413 was a year ago so I have a year left compliant.

As I interpret 91.413 swapping out the transponder requires the 91.413. The two questions are has anyone done this w/o the full 91.411 (can it be done) and I am correct that no error should be introduced in to the system as the Skyview and pitot/static components are "unchanged" and therefore it is not required by regs?

Thanks in advance!
Craig

 

[mexiwi]

If you were installing a replaacsment 327 then you could make the argument that the altitude tests are not required, but with a new system installation both 91.413 transponder test and 91.411 encoder/altitude input will be required