UTC Aerospace Systems has two main segments: Aircraft Systems and Power, Control & Sensing Systems. These segments are then broken down into several business units.
The Aircraft Systems consists of Actuation Systems, Aerostructures, Air Management Systems, Interiors, Landing Gear, Propeller Systems, and Wheels & Brakes.
The Power, Control & Sensing Systems consists of Electric Systems, Engine Components, Engine & Control Systems (E&CS), Fire Protection Systems, ISR Systems, Sensors & Integrated Systems, and Space Systems.
UTC Aerospace Systems is the owner of Ithaco Space Systems, Inc., formerly owned by Goodrich Company. Ithaco produced items for the field of satellite control since 1962, such as Earth sensors, reaction/momentum wheels, magnetometers and magnetic torquers. In addition to over 100 U.S. satellites, equipment crafted by Ithaco flew on Japanese, Canadian, French, German, Spanish, Swedish, and Argentinean spacecraft. Ithaco became notable for having manufactured the reaction wheels of the Kepler spacecraft, the Hayabusa spacecraft, the Mesosphere Energetics and Dynamics (TIMED) satellite and the Dawn spacecraft, which developed problems or even failed. The ROSAT reaction wheels lasted over 8 years. UTC Aerospace Systems announced in August 2012 layoffs at Ithaco Space Systems due to Ithaco having been "focused on space programs that have recently seen slower growth", and further layoffs at former Hamilton Sundstrand.