As, according to ATC, another aircraft overflew Sabadell at the same time, Barcelona ATC mistook that second aircraft's radar echo for that of the Dan-Air Comet and so the air traffic controller handling the Dan-Air flight did not notice the navigational error by the Comet's crew.
Cando, segundo o ATC, outro avión sobrevoaba Sabadell ao mesmo tempo, o ATC de Barcelona confundiu o eco de radar dese segundo avión co do Comet de Dan-Air polo que o controlador de tráfico aéreo que se encargaba do voo de Dan-Air non se decatou do erro de navegación da tripulación.