Under what condition does the aural device operate in a landing gear warning system?

The aural device in a landing gear warning system is designed to activate when specific conditions indicate a potential risk of landing without the landing gear being properly deployed. The correct condition is when the throttle is in a retarded position (usually low power settings) while the landing gear is not down and locked. This situation typically occurs when an aircraft is approaching to land, and it alerts the pilot that the aircraft is not configured correctly for landing.

The rationale for this design is to enhance safety by preventing landing on an aircraft that is not properly prepared. By providing an audio alert, it prompts the pilot to check the landing gear status and take corrective actions if necessary. It is a critical feature that ensures pilots are aware of the landing gear configuration in relation to their power settings, which is particularly important during the approach phase of flight, where the risk of landing gear oversight is heightened.