At night, what does the flashing of the taxi light signal?

The flashing of the taxi light at night is primarily a signal to indicate a loss of hydraulic nose wheel steering. This signal is crucial for ground crew and other personnel to recognize that the aircraft may not be able to maneuver as normally expected.

When the nose wheel steering is compromised, it can affect the aircraft's ability to taxi safely and accurately. Therefore, the flashing light serves to alert those on the ground to exercise caution around the aircraft, as it may need additional assistance or modified clearance during taxi operations.

In a well-functioning aircraft, the taxi light would not flash without reason. Other signals, such as notifications for engine start, warnings about low fuel, or requests for takeoff clearance, involve different signaling systems or procedures and do not utilize the taxi light in this manner. Thus, the flashing of the taxi light specifically indicates a problem with the steering system, emphasizing the importance of recognizing and responding to it appropriately in an operational context.