What is a common indication of a gear extension fault?

• A. Audible gear warning.
• B. A red gear fault light.
• C. Light green indicator on the landing gear.
• D. A cabin message.

Answer: (B)

A gear extension fault is signaled most clearly by a red gear fault light. This red warning light is designed to illuminate whenever the gear extension/lock system detects an abnormal condition or failure to extend and lock properly, giving the crew an immediate, unambiguous indication that attention is needed. The red color is used specifically to denote a fault or dangerous condition, so it stands out even in cluttered cockpit environments.

An audible gear warning is typically tied to a specific unsafe condition (for example, gear not down and locked on approach) and may occur alongside other cues, but it’s not itself the standard indication of a fault in the extension system. A light green indicator usually signals normal gear position (down and locked or in transit in some configurations), not a fault. A cabin message can appear, but it is aircraft-dependent and generally less immediate than a dedicated fault light on the gear warning system.