If the T/R SERVO 1 FAIL caution appears, what should automatically happen?

If the T/R SERVO 1 FAIL caution appears, what should automatically happen?

• A. The Main Pump Should Come On and Pressurize the 2nd Stage Tail Rotor Servo
• B. The SAS Should Remain Engaged
• C. The Backup Pump Should Come On and Pressurize the 2nd Stage Tail Rotor Servo
• D. The Flight Director Should Override

Answer: (C)

When a T/R SERVO 1 FAIL caution appears, the helicopter’s hydraulic logic automatically activates the backup pump to preserve tail rotor control. The tail rotor system uses two stages of servo pressure, and if the primary servo path has failed, the backup pump comes on to pressurize the second stage tail rotor servo. This keeps the pilot’s ability to control the tail rotor pitch and maintain directional stability. The main pump normally serves the primary hydraulic path, but it is not what’s automatically commanded to energize in this fault condition. The SAS and Flight Director are not automatically overridden by this caution, so they do not replace the hydraulic action needed to restore tail rotor authority.

When a T/R SERVO 1 FAIL caution appears, the helicopter’s hydraulic logic automatically activates the backup pump to preserve tail rotor control. The tail rotor system uses two stages of servo pressure, and if the primary servo path has failed, the backup pump comes on to pressurize the second stage tail rotor servo. This keeps the pilot’s ability to control the tail rotor pitch and maintain directional stability.

The main pump normally serves the primary hydraulic path, but it is not what’s automatically commanded to energize in this fault condition. The SAS and Flight Director are not automatically overridden by this caution, so they do not replace the hydraulic action needed to restore tail rotor authority.