Patent ID: 8087255

Claim:
Air-conditioning system ( 10 ) for aircraft, in particular for commercial aircraft, with two independent redundant air-conditioning system sections, each section comprising a tapped air source ( 12 ), a tapped air line ( 22 - 30 ) comprising a main valve ( 16 ), and an air-conditioning unit ( 32 ), wherein a mass air flow conveyed from the tapped air source ( 12 ) via the tapped air line ( 22 - 30 ) to the air-conditioning unit ( 32 ) can be controlled by means of the main valve ( 16 ), characterised in that between the tapped air source ( 12 ) and the air-conditioning unit ( 32 ) there is provided a by-pass line ( 36 - 50 , 58 , 60 ) comprising a by-pass valve ( 34 ) and by-passing at least a part ( 22 - 26 , 16 ) of the tapped air line, the by-pass line ( 42 - 50 ) being part of a second air system that is at least partly independent of the air-conditioning system ( 10 ), which by-pass line is designed so that it can be operated to supply the air-conditioning unit with a sufficient mass air flow.