Lufthansa CityLine Bombardier CRJ-1000 (operated by Air Nostrum) sunny Leipzig Landing [AirClips]

Air Nostrum, legally incorporated as Air Nostrum, Líneas Aéreas del Mediterráneo, S.A., is a Spanish regional airline based in Valencia.

It currently operates as a franchisee of Iberia as Iberia Regional and an affiliate member of the Oneworld airline alliance. Air Nostrum operates 91 domestic and international routes to 51 destinations, and charter flights. Its main base is Valencia Airport, with hubs at Barcelona Airport and Madrid-Barajas Airport. Limited operations are also carried out on behalf of Brussels Airlines, replacing related wet-lease specialist airline CityJet, having begun in late 2018.

The Bombardier CRJ (for Canadair Regional Jet) is a family of regional jets manufactured by Bombardier. Bombardier claims it is the most successful family of regional jets in the world. By October 2018, 1,800 CRJs have been delivered.

The Bombardier CRJ700, CRJ900, and CRJ1000 are a family of regional jet airliners designed and manufactured by Canadian transportation conglomerate Bombardier; the trio of aircraft has been collectively marketed by the company as the CRJ Series. Their design was derived from the smaller CRJ100 and 200 airliners.

During the 1990s, Bombardier initiated development on the CRJ-X, a programme to produce enlarged derivatives of its popular CRJ100/200 family. Officially launched in 1997, the CRJ700's maiden flight took placed on 27 May 1999; it was soon followed by the stretched CRJ900 variant. Several additional variants of the type were subsequently introduced, including the CRJ550 and the elongated CRJ1000. While production of the smaller CRJ100/200 range was discontinued during 2006, the larger CRJ Series models have continued to be produced into the 2010s. Competitors have included the Fokker 70/Fokker 100, the BAe 146 family, and the Embraer E-Jet family.

During the early 1990s, Bombardier Aerospace became interested in developing larger variants of the CRJ100/200 series; associated design work commenced in 1994. The CRJ-X, as the new range was initially designated, sought to compete with larger regional jets such as the Fokker 70/Fokker 100 or the BAe 146 family. The CRJ-X featured a stretched fuselage, a lengthened wing and up-rated General Electric CF34-8C engines while maintaining a common type-rating with the basic CRJ. Leading-edge extensions and high-lift slats improved the wing performance, other aerodynamic changes included an enlarged horizontal tailfin. By March 1995, low-speed wind tunnel testing confirmed a 2,830km (1,530nm) range in the 74-seat North American configuration and 2,350km in the 72-seat European configuration. First deliveries were then planned for 1999.

In 1995, the development was projected to cost around C$300 million (US$200 million). In June 1996, Bombardier selected Rockwell Collins' Pro Line 4 avionics suite.[13] During May 1996, General Electric formally launched the previously selected CF34-8C variant. Resulting from a high level of redesigning performed, the CRJ700 retains only 15% of unmodified CRJ200 airframe. The CRJ-X launch was delayed by several months, due to negotiations with suppliers and subcontractors.[16] During September 1996, Bombardier's board authorised sales of the CRJ-X. During January 1997, the CRJ-X was officially launched.

On 19 February 2007, Bombardier launched the development of the CRJ1000, previously designated CRJ900X, as a stretched CRJ900, with up to 100 seats. The CRJ1000 completed its first production flight on 28 July 2009 in Montreal; the entry into service was planned then for the first quarter of 2010. A month after the first flight, however, a fault in the rudder controls forced the flight-test program to be grounded : the program was not resumed until February 2010, and deliveries were projected to begin by January 2011. Brit Air and Air Nostrum were the launch customers for the CRJ1000.

Bombardier Aerospace announced on 10 November 2010 that its 100-seat CRJ1000 was awarded Aircraft Type Certificates from Transport Canada and European Aviation Safety Agency, allowing for deliveries to begin. On 14 December 2010, Bombardier began CRJ1000 deliveries to Brit Air and Air Nostrum. On 23 December 2010, it was announced that the Federal Aviation Administration had also awarded a type certificate, allowing the CRJ1000 to operate in US airspace. Bombardier states that it offers better performance and a higher profit per seat than the competing Embraer E-190.The FAA Type Certificate designation of the CRJ1000 is the CL-600-2E25.

In 2018, a new CRJ1000 discounted price is $24.8M, a 2015 model is valued $22.0M, a 2010 one is worth $15.5M for a $155,000 monthly lease, and it will be $12.0M in 2021 for a $145,000 monthly lease while its D Check costs $800,000 and its engine overhaul costs $0.9 to 2.4M.