But ... surprise surprise... the CASA document is ambiguous. That often happens when people try to paraphrase something.
Are you saying the Mode S requirement is triggered (assuming the airpace class/altitude criteria are met) if I either:
1. install a new transponder system in my aircraft, or
2. install a second hand transponder system to replace the system currently fitted to my aircraft,
but not if I replace unserviceable components of an existing transponder system in my aircraft with serviceable components?
Why does the avionics shop referred to above have a different understanding?
Last edited by Lead Balloon; 17th Aug 2016 at 07:30.