What is indicated by the TAD FAIL annunciator?

• A. Rudder TAD is operational
• B. Rudder TAD failure is detected
• C. Rudder TAD is disengaged
• D. Rudder TAD is functioning normally

Answer: (B)

The TAD FAIL annunciator indicates that a failure in the Rudder Trim Assistant Device (TAD) has been detected. This warning serves as an important alert to the pilot, indicating that the system designed to assist with rudder trim is no longer functioning correctly. The TAD system is responsible for automatically adjusting rudder trim based on various flight parameters, contributing to improved aircraft stability and control.

When the TAD FAIL warning is active, pilots need to be aware that they may require manual input to maintain proper rudder trim, as the automatic adjustments will not occur. It’s vital for pilots to respond to this warning appropriately to ensure continued aircraft controllability. In this scenario, the other options do not accurately reflect the meaning of the TAD FAIL annunciator, as they imply normal operation or disengagement rather than a detected failure of the system.