What primary data does the Air Data Reference provide to avionics, autopilot, and FMS?

• A. Airspeed, attitude, altitude, and other data used by avionics, autopilot, and FMS
• B. Engine oil temperature, fuel flow, and tire pressure
• C. Cabin pressure and temperature
• D. VHF radio status and audio levels

Answer: (A)

Air Data Reference is the source of the core air data that cockpit systems rely on to understand the aircraft’s flight conditions. It provides the essential measurements such as airspeed and altitude (and related parameters like vertical speed and Mach) that feed avionics displays, autopilot guidance, and the flight management system. These data come from the pitot-static system and air data computer, allowing the PFD/ND to show accurate speeds and heights and enabling the autopilot and FMS to compute climbs, descents, and performance calculations.

The other options don’t fit because they pertain to engine health (oil temperature, fuel flow, tire pressure) or environmental and communications systems (cabin pressure/temperature, VHF radio status and audio levels), which are not delivered by the Air Data Reference.