DEVICE FOR PROVIDING CONDITIONED AIR TO AN AIRCRAFT

A device (10) adapted to provide conditioned air to an aircraft (1), comprising - a housing (11) having an housing outlet end (12), - a longitudinally collapsible hose (13) at least partially accommodated within said housing (11), the hose (13) having a hose outlet end (15) to be attached to the aircraft (1), - a hose drive (18) adapted for extracting the hose (14) out of and retracting the hose (14) into the housing (11), the hose drive (18) is adapted to contact the surface of the hose (14) to selectively push the hose (14) in a first direction (O) outward from the housing (11) or pull the hose (14) in a second direction (I) inwards to the housing (11), - a drive control (19) for controlling the hose drive (18), - an outward marker (21) attached to the hose (14), - at least one sensor (20) for detecting the presence of said outward marker (21), wherein the hose comprises an extracted length at least twice the length of the housing, wherein the hose passes through the housing outlet end, wherein the drive control (19) is adapted to respond to signals from said sensor (20) to control the hose drive (18), characterized in that the marker (21) is adapted to provide a magnetic signal or a radio signal to the sensor, to which the sensor is sensitive.