The Naval Air Systems Command (NAVAIR) intends to issue a sole-source purchase order to BAE Systems Information and Electronics Systems Integration, Inc. for the repair and support of APX-123 IFF CXP systems. The work includes non-recurring engineering, reliability improvements, qualification testing, repair, modifications, and spare parts. This is a follow-up to a Sources Sought notice that received no responses, and BAE is considered the only known source capable of performing the work. Interested parties may submit a capability statement within fifteen days of the synopsis publication for the government's consideration regarding a potential competitive procurement. No specific budget or performance location is detailed in this announcement.