Boeing to relocate F/A-18 Service Life Modification (SLM) work out of the St. Louis region and will sunset work in 2027 to support site expansion. ~ Press Release, St. Louis, 24 September 2025 : As part of Boeing's expansion and transition plans to support future programmes, the company is relocating its F/A-18 Super Hornet Service Life Modification (SLM) work out of the St. Louis region and will sunset the St. Louis based work in 2027. Boeing is considering multiple sites to transfer the work to with case studies starting at the San Antonio and Jacksonville sites. Boeing currently performs SLM work in San Antonio and in partnership with the US Navy at Fleet Readiness Center (FRC) Southwest in San Diego, Calif. Additional F/A-18 modification work also occurs in Jacksonville, Fla.