The Allied Pilots Association, the union covering pilots of American Airlines and its parent AMR Corp., has approved a possible framework for covering pilots if American should merge with US Airways. Allied’s agreement, which passed the board of directors with an 11-5 vote on Saturday, would be void if a merger did not take place. The managements of American and US Airways, along with the US Airline Pilots Association, have to approve terms of the deal. Details of the...