APU Box on Electrical Synoptic Page color logic

[rcoultas]

Hey guys,

Wonder if you could help me a bit on the color logic for the APU box on the Elec Synoptic Page?  

* Is the APU box suppose to turn "green" when the APU is running, or does it only turn "green" when the APU generator is selected on and powering a bus? 

* I noticed that the Primary Ext Pwr and the Secondary Ext Pwr boxes on the synoptic page are always "green"  when connected to the aircraft, even if not selected on, and I thought the APU logic was the same?

 

 

 

[downscc]

Good question.  I browsed the FCOM, which I am sure you have already done, and found that the green highlight means available or connected.  I see your logic expecting the APU symbol to behave same as EXT ones (green if available); however, I also see the logic of them not being the same because an available but not electrically connected APU is available on the MFD display.. so one should look here to see APU status and not the electrical synoptic.  External power is only shown on the electrical syoptic so I can see how the logic for green is different even if not specifically explained this way in the FCOM.