Pre-conditioned air (PCA-) device for conditioning air in an interior of a cabin of a parked aircraft and for sanitizing an air and surfaces in the interior of the cabin, the PCA-device comprising, • an air pre-conditioning (PCA-) unit comprising, ∘ a PCA-inlet configured for admitting ambient air from a surrounding environment, the ambient air being at an ambient temperature (Ta), at an ambient relative humidity (RHa), and an ambient pressure, ∘ an air filtration section located downstream of the PCA-inlet, ∘ an air conditioning section located downstream of the PCA-inlet, ∘ a PCA-outlet located downstream of both air filtration and air conditioning sections, and configured for dispensing a pre-conditioned air stream of pre-conditioned air at a pre-conditioned temperature (Tc ≠ Ta) different from the ambient temperature (Ta), at a pre-conditioned relative humidity (RHc > 0) having a positive value, and at a pre-conditioned pressure (Pc > Pa) greater than the ambient pressure (Pa), • an air distribution ducting comprising a flexible portion, the air distribution ducting extending from a proximal end in fluid communication with the PCA-outlet, to a distal end provided with a coupling head configured for being fluidly coupled to an internal air circulation duct of an aircraft, • wherein the PCA-device defines a continuous air pathway extending from the PCA-inlet to the coupling head, characterized in that, the PCA-device comprises a photo catalytic oxidation unit located downstream of the PCA-inlet, preferably at or downstream of the PCA-outlet and intersecting the continuous air pathway, the photo catalytic oxidation unit being configured for producing a peroxided air by formation of dry hydrogen peroxide at a concentration below 1 ppm in the pre-conditioned air dispensed out of the PCA-outlet, wherein the photo catalytic oxidation unit comprises, • a source of ultraviolet (UV-) light configured for irradiating a UV-volume with UV-light, and • a catalyst located within the UV-volume and intersecting the continuous air pathway. • an air pre-conditioning (PCA-) unit comprising, ∘ a PCA-inlet configured for admitting ambient air from a surrounding environment, the ambient air being at an ambient temperature (Ta), at an ambient relative humidity (RHa), and an ambient pressure, ∘ an air filtration section located downstream of the PCA-inlet, ∘ an air conditioning section located downstream of the PCA-inlet, ∘ a PCA-outlet located downstream of both air filtration and air conditioning sections, and configured for dispensing a pre-conditioned air stream of pre-conditioned air at a pre-conditioned temperature (Tc ≠ Ta) different from the ambient temperature (Ta), at a pre-conditioned relative humidity (RHc > 0) having a positive value, and at a pre-conditioned pressure (Pc > Pa) greater than the ambient pressure (Pa), ∘ a PCA-inlet configured for admitting ambient air from a surrounding environment, the ambient air being at an ambient temperature (Ta), at an ambient relative humidity (RHa), and an ambient pressure, ∘ an air filtration section located downstream of the PCA-inlet, ∘ an air conditioning section located downstream of the PCA-inlet, ∘ a PCA-outlet located downstream of both air filtration and air conditioning sections, and configured for dispensing a pre-conditioned air stream of pre-conditioned air at a pre-conditioned temperature (Tc ≠ Ta) different from the ambient temperature (Ta), at a pre-conditioned relative humidity (RHc > 0) having a positive value, and at a pre-conditioned pressure (Pc > Pa) greater than the ambient pressure (Pa), • an air distribution ducting comprising a flexible portion, the air distribution ducting extending from a proximal end in fluid communication with the PCA-outlet, to a distal end provided with a coupling head configured for being fluidly coupled to an internal air circulation duct of an aircraft, • wherein the PCA-device defines a continuous air pathway extending from the PCA-inlet to the coupling head, • a source of ultraviolet (UV-) light configured for irradiating a UV-volume with UV-light, and • a catalyst located within the UV-volume and intersecting the continuous air pathway.