Sikorsky is currently profitable with EBITDA margins around 6%, but this is well below other divisions of UTC. Approximately 72% of Sikorsky's current revenues come from defense/government sales. Defense spending will likely continue its downward trend for the foreseeable future, which will make it hard for Sikorsky to remain profitable.
It appears UTC management sees this situation the same way. So UTC is looking to "spin off" (ie. dump) Sikorsky while they can get max value from it. I suspect UTC will probably saddle Sikorsky with some new debt before the "spin off" so they can pull cash out of the company.