What is the function of the Air Data Pressure Transmitter?

• A. Displays altitude directly
• B. Controls landing gear
• C. Converts pneumatic static and total pressure inputs from the L-shaped pitot static/total temperature probes into digital signals proportional to the measured pressures.
• D. Generates electrical power for avionics

Answer: (C)

The function being tested is how the air data system turns real-world air pressures into usable electrical signals for the aircraft’s avionics. The Air Data Pressure Transmitter takes the pneumatic pressures from the pitot tube (total pressure) and from the static ports (static pressure) and converts them into electrical signals that are proportional to those pressures. These signals feed the air data computer, which uses them to determine airspeed, altitude, and related flight data that are displayed to the crew. It does not display altitude directly, nor does it control landing gear or generate electrical power. The transmitter’s job is to translate the measured pressures into calibrated electrical information the flight computers can process.