http://www.aeroexpress.com/products/pdfs/atc601.pdf
I've just realised 'IFR' is now 'Aeroflex' - Sorry!
The IFR ATC 601 is by far the most common ATC Xponder test kit
in UK Part 145 MROs at present.
As for who is qualified to perform the work? A skilled
& suitably trained technician strictly following the applicable AMM
ATA Chapter 34.
A type rated B2/Avionics licenced aircraft engineer with a company approval will be required to certify the work completed.
BAe 146???
