The United Arab Emirates' civil aviation regulator has opened an investigation into an aborted take-off by an Emirates airline passenger jet this month at Dubai airport, the carrier said on Saturday.It is the second inquiry launched into the airline in less than a month, after another passenger jet in December did not immediately increase its ascent after take-off. The flight landed safely.An Emirates spokesperson said that safety is its top priority and there was no aircraft damage or any injuries as a result of the aborted take off from Dubai on Jan. 9.