centre, production jobs and money toward the new production centre. Airbus manufactured the first structural component in December 2009. Production of the first fuselage barrel began in late 2010 at its production plant in Illescas, Spain. Construction of the first A350-900 centre wingbox was set to start in August 2010. The new composite rudder plant in China opened in early 2011. The forward fuselage of the first A350 was delivered to the final assembly plant in Toulouse on 29 December 2011. Final assembly of the first A350 static test model was started on 5 April 2012. Final assembly of the first prototype A350 was completed in December 2012. In 2018, the unit cost of the A350-900 was US$317.4 million and the A350-1000 was US$366.5 million. The production rate was expected to rise from three aircraft per month in early 2015 to five at the end of 2015, and would ramp to ten aircraft per month by 2018. In 2015, 17 planes would be delivered and the initial dispatch reliability was 98%. Airbus announced plans to increase its production rate from 10 monthly in 2018 to 13 monthly from 2019 and six A330 are produced monthly. Around 90 deliveries were expected for 2018, with 15% or ≈ units being A350-1000 variants. That year, 93 aircraft were delivered, three more than expected. In 2019, Airbus delivered 112 A350s (87 A350-900s and 25 A350-1000s) at a rate of 10 per month, and were going to keep the rate around nine to 10 per month, to reflect softer demand for widebodies, as the backlog reached 579 − or years of production at a constant rate. The coronavirus crisis caused the decrease of A350 production from 9.5 per month to six per month, since April 2020. After the crises the ramp-up is planed at a rate of 9 per month by the end of 2025. Testing and certification The first Trent engine test was made on 14 June 2010. The Trent XWB's flight test programme began use on the A380 development aircraft in early 2011, ahead of engine certification in late 2011. On 2 June 2013, the Trent XWB engines were powered up on the A350 for the first time. Airbus confirmed that the flight test programme would last 12 months and use five test aircraft. The A350's maiden flight took place on 14 June 2013 from the Toulouse–Blagnac Airport. Airbus's chief test pilot said,