When is the APU indication on the MFD electrical page removed?

When is the APU indication on the MFD electrical page removed?

• A. When the APU is not available and/or the APU Master Selector is set to OFF with APU RPM below 10%
• B. When the APU is available and the APU Master Selector is ON
• C. When the APU RPM exceeds 50%
• D. When the APU is running at high voltage

Answer: (A)

The APU indicator on the MFD electrical page is shown when the APU can supply power and is being used or is available. It is removed when the APU is not available or when the APU Master Selector is OFF and the APU RPM is below about 10%. This keeps the display from implying the APU can contribute power when it isn’t ready or selected. The other scenarios don’t remove the indicator: having the APU available with the Master Selector ON would keep it visible; an RPM threshold like 50% or the APU running at high voltage doesn’t trigger removal.

The APU indicator on the MFD electrical page is shown when the APU can supply power and is being used or is available. It is removed when the APU is not available or when the APU Master Selector is OFF and the APU RPM is below about 10%. This keeps the display from implying the APU can contribute power when it isn’t ready or selected. The other scenarios don’t remove the indicator: having the APU available with the Master Selector ON would keep it visible; an RPM threshold like 50% or the APU running at high voltage doesn’t trigger removal.