Solving The Avionics Upgrade Dilemma

摘要

Historically, "Black Box" vendors designed avionics systems for specific target applications. A box-level, line-replaceable unit (LRU) was the most logical element of granularity. It allowed for aircraft configuration, while minimizing the level of complexity for the aircraft system integrator. Until the mid-1990s, it was possible to support such older custom designs with parts replacement and substitution on an as-required basis. But that level of support is increasingly difficult to provide.