Stabilator indicator references are provided by which electrical bus?

Stabilator indicator references are provided by which electrical bus?

• A. DC Converters
• B. Main Transmission
• C. AC REF BUS
• D. Battery Bus

Answer: (C)

Stabilator indicators rely on a stable AC reference signal, so they’re powered and referenced from the AC reference bus. This bus provides the controlled AC power and reference waveform that many avionics instruments and flight-control indicators use to display accurate readings. The other options don’t supply that specific AC reference: the battery bus is DC, DC converters alter power but don’t provide the dedicated AC reference, and the main transmission is a mechanical system, not an electrical reference source. If the AC reference bus were unavailable, the stabilator indicator could lose its accuracy or fail to display correctly, compromising pilot awareness of stabilator position.

Stabilator indicators rely on a stable AC reference signal, so they’re powered and referenced from the AC reference bus. This bus provides the controlled AC power and reference waveform that many avionics instruments and flight-control indicators use to display accurate readings. The other options don’t supply that specific AC reference: the battery bus is DC, DC converters alter power but don’t provide the dedicated AC reference, and the main transmission is a mechanical system, not an electrical reference source. If the AC reference bus were unavailable, the stabilator indicator could lose its accuracy or fail to display correctly, compromising pilot awareness of stabilator position.