Hot air “FAULT” light illuminates on the air conditioning panel:

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Hot air “FAULT” light illuminates on the air conditioning panel:

The hot air press reg. Valve opens and the trim air valves close

The hot air press reg. Valve closes and the trim air valves open

The hot air press reg. Valve closes and the trim air valves close

In case of Air Conditioning System Controller dual lane failure:

No effect. As the other controller will take over.

The related Pack will operate in low flow

The related Pack will operate in high flow

The related Pack is lost, and the hot air pressure regulating valve and associated trim air valves closes.

During normal flight the Avionics Ventilation System controls the temperature of the cooling air by:

Adding air conditioned air to the flow

Extracting air overboard

Adding avionics bay air

Passing air through a skin heat exchanger

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