The gear warning horn warns that the aircraft is approaching a landing condition and the landing gear is not down.

• A. Warns that the gear is not down
• B. Warns of a landing gear fault
• C. Warns that the aircraft is approaching a landing condition and the gear is not down
• D. Warns of engine overheat

Answer: (C)

A gear warning horn is meant to prevent a gear-up landing by alerting you when you’re in a landing approach but the gear isn’t extended. The essential point is that the warning activates not just because the gear is up, but because you’re in a condition where landing is imminent and the gear isn’t down.

That’s why the best choice says it warns that the aircraft is approaching a landing condition and the gear is not down — it matches both parts of the warning: the approaching-landing context and the gear status. The other options don’t capture that combination: simply saying the gear isn’t down isn’t enough context, calling it a gear fault isn’t what this horn indicates, and engine overheat is unrelated to this warning.