and support experience. Demand for such jets is 200–300 in Russia and up to 3,000 overseas; introduction could slip to early 2023. As Sukhoi and Irkut may be consolidated into United Aircraft, some structures and avionics could be closer to the Irkut MC-21 for commonality. A unified platform with identical controls would ease pilot conversions; S7 Airlines committed to 75 aircraft. In July 2018, a composite wing was preferred and a 3-metre test section will be manufactured and tested. The variant would retain the SaM146 and empty weight should be reduced by 12–15%. In 2018, serial production was planned for 2025, four years after design approval. By 2019, the priority had shifted to the replacement of Western parts on the SSJ100 so that the aircraft can be sold to US-sanctioned countries such as Iran. S7 Airlines, which had committed to 75 of the shortened aircraft, may seek alternatives from Bombardier or Embraer. In September 2019, the owner of S7, Vladislav Filev, confirmed his understanding that the SSJ75 project had been abandoned. He explained that S7 had insisted on the participation of its own experts in the test programme, and had demanded the replacement of the composite floor that showed insufficient fire resistance in the Sheremetyevo crash, together with a redesign of the wheel wells. Orders and deliveries By August 2016, 133 SSJ100s were in operation with eight airlines and five governmental and business aviation organizations. In October 2017, there were 105 SSJ100s in service worldwide: some used by government bodies such as the Royal Thai Air Force and Kazakh government agencies. The fleet had logged 230,000 flights in 340,000 hours since its commercial operations debuted in 2011. At least 30 SSJ100s were to be delivered in 2017, with 38 planned for 2018 and 37 for 2019. In May 2018, ten years after its first flight, the fleet of 127 have logged over 275,000 commercial flights and 420,000 hours. In September 2018, it had logged over 300,000 revenue flights lasting 460,000 hours. Specifications Accidents and incidents There have been three hull loss accidents and 86 deaths as of June 2019. On 9 May 2012, a demonstration flight directly struck Mount Salak in Indonesia, killing all 45 on board (Sukhoi personnel and representatives of various local airlines). The TAWS was ignored by the pilot, distracted by a conversation with a potential customer. On 21 July 2013, during autoland evaluation of an RRJ-95B