The Naval Air Systems Command intends to award a sole-source, cost-plus-fixed-fee delivery order to Collins Aerospace for engineering, avionics, and product support services related to the E-6B aircraft's Mission Avionics Systems. The work includes system modifications, upgrades, repairs, training, and in-flight engineering support. This is not a request for competitive proposals, but the government will consider capability statements received within 15 days of the synopsis publication. Responses must be submitted in writing via email to the specified contacts. Companies interested in subcontracting should contact Collins Aerospace directly.