PakistanPIA finalises plan for mass up-gradation of planesTNT DeskFebruary 13, 2014February 13, 2014 by TNT DeskFebruary 13, 2014February 13, 2014 LAHORE: Pakistan International Airlines (PIA) planned to buy four new Boeing 777s besides overhauling nine more planes under its mass up-gradation plan....