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Electrical System
Each AC bus is supplied in priority order by:
- the corresponding engine generator
- the APU generator or EXT A (if both are connected, the APU generator has priority for the left side, and EXT A has priority for the right)
- EXT B (if both external power sources are connected, EXT B has priority for the left side, and EXT A has priority for the right)
- the other side engine generator