What happens to the attitude indicator at excessive pitch angles?

What happens to the attitude indicator at excessive pitch angles?

• A. It remains accurate
• B. It tumbles
• C. It indicates the wrong heading
• D. It freezes

Answer: (B)

The attitude indicator is a vital instrument in an aircraft's cockpit that shows the aircraft's orientation relative to the horizon. At excessive pitch angles, particularly beyond the instrument's designed limits, the gyroscope inside the attitude indicator can lose its reference point and fail to maintain the correct indication. When this occurs, the indicator can "tumble," resulting in a display that does not accurately reflect the aircraft's actual attitude. This tumbling happens because the gimbals of the gyroscopic mechanism can no longer maintain a stable orientation due to the high pitch angle. Consequently, the indicator may no longer function at all, or it may swing wildly, displaying misleading information. Pilots must be aware of this limitation and know that excessive pitch angles can compromise the reliability of the attitude indicator, necessitating the use of alternative instruments and techniques for maintaining control of the aircraft’s flight path.

The attitude indicator is a vital instrument in an aircraft's cockpit that shows the aircraft's orientation relative to the horizon. At excessive pitch angles, particularly beyond the instrument's designed limits, the gyroscope inside the attitude indicator can lose its reference point and fail to maintain the correct indication. When this occurs, the indicator can "tumble," resulting in a display that does not accurately reflect the aircraft's actual attitude.

This tumbling happens because the gimbals of the gyroscopic mechanism can no longer maintain a stable orientation due to the high pitch angle. Consequently, the indicator may no longer function at all, or it may swing wildly, displaying misleading information. Pilots must be aware of this limitation and know that excessive pitch angles can compromise the reliability of the attitude indicator, necessitating the use of alternative instruments and techniques for maintaining control of the aircraft’s flight path.