NSN 4920-01-445-4422

A group of items used to reprogram all reprogrammable devices within a computer controlled aircraft system. It is capable of interfacing with other related systems, reprogramming software and developing and updating software tools required to maintain the system. It houses the equipment required to process software changes such as interface units, instruction manuals, stimuli cabinets containing one or more independent computer systems, and computer programs for processing environmental changes. It also contains line replaceable units representing a mock-up of the unit being sustained.