Aircraft airframe component with air system

A system for an aircraft, comprising:

• a vane extending spanwise from a base to a tip, the vane extending longitudinally from a leading edge to a trailing edge, and the vane extending laterally between a first side and a second side;
• and
• an air system including a first air circuit, a second air circuit, a first door assembly and a second door assembly;
• the first air circuit extending in the vane to a first circuit outlet at the first side, and the first door assembly configured to regulate flow through the first circuit outlet;
• and
• the second air circuit extending in the vane to a second circuit outlet at the second side, and the second door assembly configured to regulate flow through the second circuit outlet;
• wherein at least one of:
• the first door assembly is configured to direct a first flow of air, exhausted from the first air circuit through the first circuit outlet, longitudinally towards the leading edge during a first mode of operation, and the second door assembly is configured to direct a second flow of air, exhausted from the second air circuit through the second circuit outlet, longitudinally towards the trailing edge during the first mode of operation;
• or
• the first door assembly is configured to direct the first flow of air, exhausted from the first air circuit through the first circuit outlet, longitudinally towards the trailing edge during a second mode of operation, and the second door assembly is configured to direct the second flow of air, exhausted from the second air circuit through the second circuit outlet, longitudinally towards the leading edge during the second mode of operation.