What occurs when the gear handle is not DOWN and weight is on wheels?

When the gear handle is not in the DOWN position and there is weight on the wheels, it signals that the landing gear is not properly deployed while the aircraft is on the ground. This condition triggers an aural landing gear warning tone. The purpose of the warning tone is to alert the flight crew of a potentially unsafe condition, reminding them to ensure that the landing gear is correctly configured before taking off or during critical phases of operation. The aural warning serves to enhance safety by providing immediate feedback to the pilots, allowing them to address the situation before it results in a mishap.

In this scenario, the other potential outcomes do not align with the specified condition of the gear handle and weight on the wheels. For instance, the gear handle light illuminating red typically indicates a problem with the gear system rather than the handle's position with weight on the wheels. The activation of fire warning lights relates to the presence of fire or overheating, which is unrelated to the status of the landing gear. Finally, an aircraft losing power would refer to an entirely different issue not directly connected to the gear handle's position and weight on the wheels. This further emphasizes why the landing gear warning tone is the appropriate response in this situation.