A cavalry charge aural signal indicates?

The aural signal associated with a cavalry charge specifically indicates that the autopilot has been disconnected. This signal alerts the flight crew that the aircraft is now being flown manually, and immediate attention to the control of the aircraft is necessary.

This signal serves as an important reminder for pilots, especially during phases of flight where automated systems assist with handling the aircraft, such as during ascent or cruising. Understanding the implications of the signal helps in maintaining situational awareness and ensuring proper response to changing flight conditions.

The other options relate to various alerts that the aircraft may provide, but they do not correspond to the distinct aural signal of a cavalry charge. For instance, a Level 2 ECAM would communicate a different type of alert regarding system status, while altitude alerts deal with the aircraft's altitude maintenance and management. The option regarding landing capability change would pertain to specific configurations related to landing gear or flaps, neither of which is connected to the action of disconnecting the autopilot.