I think you'll find that the safety regulator will want evidence of the reliability of the new kit and it will have to radiate for a specified number of hrs, without failure, before it can be brought into service. By the way, the IAA's Calibration service is provided by Flight Precision Ltd (FPL) a very successful private calibration company; see their website
www.flightprecision.co.uk. FPL traces is roots back to the Flight Checking Service and 115 Sqn, RAF.
