What indicates the operational readiness of the landing light according to systems checks?

• A. Angle of deflection
• B. Illumination test
• C. Physical inspection of the light bulb
• D. Landing gear deployment status

Answer: (B)

The operational readiness of the landing light is indicated by an illumination test. This test confirms that the landing light is functioning properly and provides the necessary brightness during flight operations, particularly during landing phases. Ensuring that the landing light illuminates verifies electrical connectivity and that the bulb itself is in working condition, which are critical for safe landing procedures.

Conducting an illumination test directly assesses whether the light operates as expected in real-time conditions, making it a reliable method for determining readiness. Other options, while relevant to aircraft systems, do not specifically address the actual functionality of the landing light. For instance, an angle of deflection relates more to control surfaces than to the lighting system, a physical inspection might miss underlying electrical issues, and landing gear deployment status does not directly pertain to the operation of the landing light. Thus, performing an illumination test is the most effective means of confirming the landing light's operational readiness.