What is the function of the nose wheel well digital display indicator related to maintenance codes?

• A. Measures fuel temperature
• B. Displays engine oil pressure
• C. Controls landing gear lighting
• D. Receives and stores maintenance codes from the recorder, and provides a visual display of stored maintenance codes on operator request.

Answer: (D)

The nose wheel well digital display indicator is the maintenance-code storage and display interface. It receives maintenance codes from the onboard recorder, stores them, and can visually show the stored codes whenever the operator requests. This setup lets maintenance crews quickly review recent faults or service events without digging through separate logs, making troubleshooting more efficient after nose gear inspections or faults. It isn’t used for sensing fuel temperature or engine oil pressure, and it doesn’t control landing gear lighting, which is a separate system. The key idea is that this indicator acts as a retrievable display for diagnostic maintenance codes sourced from the recorder.