What information does ADR provide to ECAM and FMS?

• A. Electrical power status.
• B. Weather forecasts.
• C. Air data such as airspeed, altitude, vertical speed, and other related data.
• D. Cabin altitude.

Answer: (C)

Air data is what ADR provides to ECAM and FMS, feeding the systems with measurements that describe the aircraft’s current flight conditions. This includes indicated airspeed, altitude (barometric), vertical speed, Mach number, outside air temperature, and related data derived from the pitot-static and temperature sensing networks. The FMS uses these values to compute performance and navigation—orders for speed, climb/descent profiles, and vertical path management—while ECAM uses them to display accurate flight parameters and to assess against limits for warnings and system status.

Electrical power status comes from the aircraft’s electrical system, not from the air data reference. Weather forecasts come from meteorological sources and weather radar data, not ADR. Cabin altitude is produced by the pressurization system and its sensors, not the air data reference, even though cabin-related information may be shown on ECAM.