Which option is NOT a standard exterior lighting category used on aircraft?

• A. Engine indication lights.
• B. Wing inspection lights.
• C. Landing lights.
• D. Position lights.

Answer: (A)

Exterior lighting categories are the lights you see on the outside of the aircraft that help with visibility and signaling during operations. They include landing lights, which illuminate the path for landing and taxiing; position lights, which show the aircraft’s location and orientation to other pilots (the red/green/white nav lights); and wing inspection lights, which illuminate the wings from outside for visual checks. Engine indication lights, on the other hand, are part of the cockpit’s instrument system and are used to monitor engine parameters for the crew. They are not exterior lights and aren’t considered part of the standard exterior lighting set. So the option that isn’t a standard exterior lighting category is the engine indication lights.