The US Army seeks qualified sources to provide depot repair and sustainment support for the AH-64 Apache Fire Control Radar, including all necessary hardware, software, logistics, and engineering services. The anticipated contract is a Firm-Fixed Price and Cost-Plus Fixed Fee performance-based agreement with a one-year base period and four one-year options. A critical requirement is that interested offerors must demonstrate access to the Technical Data Package held by Longbow Limited Liability Company or show how to fulfill the requirements without it and without significant added cost. This is solely a market research notice, and no contract will be awarded from it. All responses must be submitted via email to the specified Contract Specialist and Contracting Officer.