On which panel do the ADIRU and AVNCS lights illuminate when the ADIRU is powered by the battery?

On which panel do the ADIRU and AVNCS lights illuminate when the ADIRU is powered by the battery?

• A. Overhead panel
• B. Ground power panel
• C. Pedestal
• D. Cockpit

Answer: (B)

When the ADIRU is powered by the aircraft battery, the indicators for the ADIRU and AVNCS are placed on the Ground Power Panel. This panel is where power-source status for essential avionics is shown during ground operations and battery-based power, so you can quickly confirm that the navigation-related units are receiving power even without external power or APU on. The other panels aren’t where these specific power-status lights are located, so the Ground Power Panel is the logical place for these indications.

When the ADIRU is powered by the aircraft battery, the indicators for the ADIRU and AVNCS are placed on the Ground Power Panel. This panel is where power-source status for essential avionics is shown during ground operations and battery-based power, so you can quickly confirm that the navigation-related units are receiving power even without external power or APU on. The other panels aren’t where these specific power-status lights are located, so the Ground Power Panel is the logical place for these indications.