When will a landing gear aural warning typically sound?

The aural warning for landing gear is designed to alert pilots when the throttle is retarded and the landing gear is not down and locked. This scenario is critical because it often occurs during an approach to landing or when the aircraft is in a configuration where gear deployment is necessary for safety. The system aims to prevent accidents that could result from forgetting to extend the landing gear before landing, as landing without the gear can cause significant damage to the aircraft and jeopardize the safety of everyone onboard.

In contrast, the other situations presented do not typically trigger the landing gear aural warning. For instance, reaching cruising altitude does not involve concerns about the landing gear position. Similarly, the warning is not limited to moments during takeoff or when the landing gear is simply retracted, since the critical aspect involves the relationship between throttle position and gear state when lower airspeeds and landing configurations are expected.