Buses

Also from: Electrical Buses

The AC buses are labelled as AC main bus number (1 or 2) . engine number (1 through 4). They are 1.1, 1.2, 2.3 and 2.4.

AC 1.1 → ESS TR

AC 1.2 → TR 1

AC 2.3 → TR 2

AC 2.4 → APU TR

AC ESS is supplied by AC 1.1, although AC 2.4 takes over automatically if AC 1.1 fails.

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