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Preconditioned Air and 400 Hz Power

When aircraft are parked at the gate, they need a source to power instruments, interior lighting, and provide conditioned air in the cabin. The most efficient and environmentally friendly way to do this is by providing preconditioned air and 400 Hertz (Hz) power connections at each aircraft parking position. Without these connections, aircraft are required to either run their auxiliary power units (a small jet fuel engine located under the aircraft tail) or use a diesel-powered ground power unit. There are 199 aircraft parking positions in the Central Passenger Terminal Complex. Of the 199 positions, approximately 90 percent are equipped with preconditioned air and 400 Hz power.

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