The FAA still needs to approve the results of the test flight and certify the battery system. Boeing's 787 Dreamliner has been grounded since mid-January because of smoldering batteries.
Leaders of the deal between American Airlines and US Airways decided early on that they would only proceed as long as they had the backing of American employees. The two sides believe they would receive regulatory backing for a merger. The new company is to be called American Airlines and based out of Fort Worth, Texas.