BARACHI:- Four ATR planes of Pakistan International Airline (PIA) have been grounded temporarily. Sources said that planes were grounded to overhaul the engines. According to PIA spokesperson, these plains have been grounded for overhauling engines. These have been grounded on temporary basis under the directives of Civil Aviation Authority (CAA). He said safety of passengers is PIA’s first priority. Flights to Gilgit, Skardu, Chitral, Sukkar , Mohinjodorro, and Nawab shah, Gwadar, Turbat, Panjgur and Multan will be affected due to grounding of these plains.–Online