Which of the following is an indication of potential landing gear malfunction?

The indication of a potential landing gear malfunction is represented by a flashing red light combined with a horn. This warning system is designed to alert the flight crew to a serious issue that may require immediate attention. The flashing red light signifies a critical failure or malfunction with the landing gear, and the accompanying horn serves as an auditory alert to ensure that the crew notices the issue promptly.

In typical aircraft operation, a red light is associated with caution or emergencies, and the combination of both a visual and auditory warning enhances the urgency of the situation. In contrast, other indicators, such as the presence of all green lights or a single horn warning, suggest that the system is functioning normally or alerting the crew to a less urgent condition. Moreover, having the landing gear handle in a neutral position generally indicates that the gear is neither deployed nor retracted and is not an immediate warning of malfunction.