Chapter 9 - Section 10: System Schematic Architecture

Question 1

What is the purpose of the Open World Diode (OWD) in the avionics domain?

Answer 1

Prevents communications access from the flight and cabin domains to the avionic domain

Allows unidirectional communication from the avionics to the other 2 domains

Question 2

What is the purpose of the Secure Router Interface Unit (SIRU) of the avionics domain?

Answer 2

Ensure secure information transfer to/from the ACARS system