GE Aviation Systems (formerly Smiths Aerospace).Smiths Aerospace was formerly one of four business units of Smiths Group plc., an engineering company and constituent of the FTSE 100 share index. However, it was announced on January 15, 2007 that Smiths Group was divesting Smiths Aerospace to General Electric for US $4.8 billion. Smiths Aerospace, which was an important supplier, became an operating subsidiary of GE Aviation.