On 25 August 2012, the Swedish government announced that a procurement of 40–60 JAS 39E/F Gripens was expected, and planned to be in service by 2023. On 11 December 2012, the Riksdag approved the purchase of 40 to 60 JAS 39E/Fs, but with an option to cancel if at least 20 aircraft are not ordered by other customers. The government approved the deal for 60 Gripen Es on 17 January 2013, with deliveries scheduled from 2018 to 2027. On 3 March 2014, the Swedish defence minister stated that another 10 Gripen Es might be ordered. This was later confirmed by the Swedish government.All in-service Gripens as of January 2014 are powered by the Volvo RM12 turbofan engine (now GKN Aerospace Engine Systems), a license-manufactured derivative of General Electric F404 ; changes include increased performance and improved reliability to meet single engine use safety criteria, as well as a greater resistance to bird strike incidents. Several subsystems and components were also redesigned to reduce maintenance demands. By November 2010, the Gripen had accumulated over 143, 000 flight hours without a single engine-related failure or incident; Rune Hyrefeldt, head of Military Program management at Volvo Aero, stated "I think this must be a hard record to beat for a single-engine application".
