On 8 August 2011 an Air France Airbus A319 crew failed to correctly identify the runway on which they were cleared to land off a visual approach at Casablanca and instead landed on the parallel runway. ATC, who had already cleared another aircraft to cross the same runway, did not notice until this other aircraft crew, who had noticed the apparently abnormal position of the approaching aircraft and remained clear of the runway as a precaution, advised what had happened. Investigation was hindered by the stated perception of the Air France PIC that the occurrence was not a Serious Incident.