The expansion of the Aero Engine MRO facility by Barnes Aerospace, a division of Barnes Group Inc., is a strategic move to bolster its position in the aerospace sector. This expansion is likely to enhance the company's service capabilities, potentially leading to increased demand for its services and possibly higher revenues. Given the strategic nature of this expansion and its potential to impact the company's growth in the aerospace sector, it is expected to have a positive short-term impact on Barnes Group Inc.'s stock price.