The Federal Communications Commission has approved Time Warner Cable's purchase of Insight Communications.In an order issued this week, the FCC declared that the potential benefits to service under the sale outweigh any possible public harm. The three billion dollar deal has already earned approval from the Federal Trade Commission, and an Insight spokesman says this puts the sale on track to close soon.Even with the federal permissions, Insight's exact status with Louisville Metro Government remains unclear. Insight and the mayor's office have been negotiating a new contract for over a year. The city wants Insight to keep its call center in Louisville, preserve free service for government buildings and continue giving free cable boxes to elderly and disabled customers. Neither side is sharing details, but they say there's progress. Insight officials won't say whether they'll go through with the deal without a contract with the city.