I have just observed my own statement, above, and realised how the civil aircraft types mentioned reflect how the EMAR systems may move toward in the future. With a clear difference between 'Airworthiness' (as apparently governed by the needs of EASA and civilian licensing of maintenance techs) and 'Role Equipment' which I define as those systems which do not have a direct effect on the aircraft's ability to maintain flight and land under control.
Food for thought.