Pilatus Concludes PC-24 Rough Strip Certification Swiss airframer Pilatus Aircraft announced that it has successfully concluded rough-field certification campaign. Rough-field operations under the certification is grass, wet earth and snow. Of course back in 2018 the aircraft was certified to operate on gravel as well as dry sand. Put all together and it puts the PC-24 in a class of its own in terms of operating from a myriad of unproven surfaces. That is partly what gives it such broad appeal to a number of customers like the Royal Flying Doctor Service (RFDS) that may have to operate from some of these types of strips given the nature of their work.