Are RS03 limits in the HF frequency band realistic?

A practical problem in EMC (electromagnetic compatibility) RS03 testing is discussed: namely, that airborne equipment which has successfully passed the RS03 tests in the screen room, has failed totally when operating on the intended aircraft. For flight critical equipment, such inconsistencies between test results and real life data could be fatal. It is pointed out that the HF band is particularly prone to these inconsistencies due to the many error sources which are introduced when trying to directly apply screenroom RS03 test results, obtained according to the MIL-STD-461C/462 test methods, to real-life installations and scenarios. Some recommendations on addressing this problem are presented