| Display Selector |
| Ground Power and Bus Switching Panel with associated APU Lights and Indicators |
SOURCE OFF Light
Illuminated –
No source has been manually selected to power the related
Transfer Bus or the manually selected source has been
disconnected.
Illuminated –
No source has been manually selected to power the related
Transfer Bus or the manually selected source has been
disconnected.
- If a source has been selected to power the opposite
Transfer Bus then both Transfer Busses are powered.