An investigation launched by US commerce secretary Howard Lutnick is looking at the impact of current trade policies on US domestic production of commercial aircraft, engines and parts to see whether additional tariffs and quotas are necessary "to protect national security". The probe was launched on 1 May under section 232 of the Trade Expansion Act of 1962 but revealed on 9 May in a filing to the Federal Register by Bureau of Industry and Security deputy assistant secretary for strategic trade Julia Khersonsky. The Commerce Department has invited interested parties to submit comment. It notes it is "particularly interested" in comments and information about "current and projected demand for commercial aircraft and jet engines, and parts for commercial aircraft and jet engines, in the United States". It is also interested in "the extent to which domestic production of commercial aircraft and jet engines, and parts for commercial aircraft and jet engines, can meet domestic demand", as well as "the role of foreign supply chains, particularly of major exporters, in meeting US demand for commercial aircraft and jet engines, and parts for commercial aircraft and jet engines". Furthermore, Commerce is interested in "the concentration of US imports of commercial aircraft and jet engines, and parts for commercial aircraft and jet engines, from a small number of suppliers and the associated risks", as well as "the impact of foreign government subsidies and predatory trade practices on the competitiveness of the commercial aircraft and jet engine industry, as well as the associated commercial aircraft and jet engine parts industry, in the United States". It also seeks comment on "the ability of foreign nations to weaponise their control over supplies of commercial aircraft and jet engines". Commerce also wants to know about "the feasibility of increasing domestic capacity for commercial aircraft and jet engines, and parts for commercial aircraft and jet engines, to reduce import reliance".

'ACIA Aero Leasing has delivered two ATR 72-600 turboprops on lease to Aer Lingus Regional operator Emerald Airlines. The aircraft, which are configured in a 72-seat layout, increase Emerald Airlines’ fleet to 20 ATR 72-600s. Emerald is a new customer for ACIA. "The delivery of the first aircraft under this contract, which will join our Dublin-based fleet, will continue to enhance the resilience and reliability of our operations," states Emerald Airlines chief operations officer Richard Spencer. "As we continue to expand our service offerings across our route network, we look forward to builng a strong and successful partnership with ACIA Aero Leasing."

Irish regional operator CityJet is seeking protection from creditors for the second time in five years. A petition to the Irish High Court to appoint an examiner, was filed by the airline on 8 May. An interim order was granted until a court hearing on 26 May. CityJet had entered examinership – a process in Irish law through which companies can protect themselves from creditors while they restructure – in April 2020 as the Covid-19 pandemic took hold. It exited that restructuring process in August 2020 as a smaller carrier focused on providing wet-lease services. Fleets data shows that CityJet has a fleet of three owned MHIRJ CRJ900 regional jets, which are listed as being in storage.