ADIRU in Airbus A320 provides data to which primary components?

• A. Standby Attitude Indicators
• B. Flight Crew Oxygen System
• C. Fuel Management Computer
• D. Air Data Computers and Attitude Reference System

Answer: (D)

ADIRU combines inertial data with air data to provide the aircraft’s essential measurements. The data from the ADIRU is used by two main groups: the Air Data Computers, which convert pitot/static and temperature information into air data like airspeed, altitude, vertical speed, and Mach; and the Attitude Reference System, which uses the inertial information to determine the aircraft’s attitude and heading. Those outputs feed the cockpit displays and flight control systems, keeping attitude, heading, and air data accurate for pilots and for automatic systems. The Flight Crew Oxygen System and the Fuel Management Computer rely on separate sensor data (cabin/oxygen-related sensors and fuel quantity sensors, respectively) and do not use ADIRU data. The Standby Attitude Indicator is backed by the ARS, which in turn relies on ADIRU data, but the direct recipients of ADIRU data are the Air Data Computers and the Attitude Reference System.