L-3 Communications Vertex Aerospace LLC, Madison, Miss., is being awarded a $27,293,685 indefinite-delivery requirements contract for logistics services support of the TH-57 aircraft fleet.  Services to be provided include repair and/or overhaul of aircraft, engines, avionics and related components.  Funds will not be obligated at time of award.  Work will be performed at Naval Air Station Whiting Field, Milton, Fla., and is expected to be completed in March 2013.  Contract funds will not expire at the end of the current fiscal year.  This contract was not competitively procured pursuant to 10 U.S.C. 2304(c)(1).  The Naval Air Systems Command, Patuxent River, Md., is the contracting activity (N00019-12-D-0003).