What does the SAS DEGRADED advisory mean?

What does the SAS DEGRADED advisory mean?

• A. Pitch, roll, and/or yaw SAS channels from SAS 1 and SAS 2 have disengaged due to a fault.
• B. SAS channels are operating normally.
• C. Only the yaw SAS channel is degraded.
• D. All SAS channels are failed.

Answer: (A)

SAS DEGRADED signals a fault that has caused the stability augmentation system channels to disengage. In the UH-60S, there are two SAS channels (SAS 1 and SAS 2) that provide stabilization for pitch, roll, and yaw. When you see this advisory, it means one or more of those channels have disengaged due to a fault, which can affect all three axes. As a result, automatic stabilization and damping are reduced, so you lose some of the automatic flight stability and must rely more on manual control, especially in hover or slow flight. This is why the statement describing pitch, roll, and/or yaw SAS channels from SAS 1 and SAS 2 having disengaged due to a fault is the best fit. It accurately reflects a degraded state in which the SAS system is not providing its normal stabilization, rather than indicating normal operation, a single-axis degradation, or a complete failure of all SAS channels.

SAS DEGRADED signals a fault that has caused the stability augmentation system channels to disengage. In the UH-60S, there are two SAS channels (SAS 1 and SAS 2) that provide stabilization for pitch, roll, and yaw. When you see this advisory, it means one or more of those channels have disengaged due to a fault, which can affect all three axes. As a result, automatic stabilization and damping are reduced, so you lose some of the automatic flight stability and must rely more on manual control, especially in hover or slow flight.

This is why the statement describing pitch, roll, and/or yaw SAS channels from SAS 1 and SAS 2 having disengaged due to a fault is the best fit. It accurately reflects a degraded state in which the SAS system is not providing its normal stabilization, rather than indicating normal operation, a single-axis degradation, or a complete failure of all SAS channels.