Well, its an E/AB I am fully qualified to perform any and all maintenance, including RTS. So yes, I can remove the xponder, send to get tested, reinstall, and perform an operational test (or whatever the manual requires).Looks like 91.413 (b) requires integrated system test following any installation or maintenance where data error could be introduced.
In a certified AC, there is a specific carve out for certain nav gear:
Wish you had a better understanding of the regulations when talking to your mechanic or the avionics shop? Aircraft Electronics Association Vice President of Government/Industry Affairs Ric Peri answers your frequently asked questions