Justification Review Document Summary

This is a Justification Review Document (CUI/SP-SSEL) issued by the National Guard Bureau on September 23, 2025, for a sole-source acquisition of Tier 4 Diesel Engines with mounted assembly kits. The requirement specifies Deutz Model D2011L04 24V, Tier 4 Diesel Engines to be procured as commercial items under simplified acquisition procedures per FAR 13.501(a). The Air National Guard requires these engines and assembly kits for installation on aircraft arresting systems, with the engines previously sourced from Wisconsin gas engines before conversion to Tier 4 Deutz diesel engines. Curtiss Wright/ESCO is identified as the sole supplier of aircraft arresting systems in the Air Force inventory and the only approved source of these specific engines for the ANG.

The justification demonstrates that only one responsible source can satisfy agency requirements, as the Deutz diesel engine is standard equipment on Curtiss Wright/ESCO aircraft arresting systems and is the only engine referenced in applicable technical orders (TO 35E-8-2-10-1 and TO 35E-8-2-5-1Aloo). The ANG has contracted with Deutz for engine production since 2019 to ensure uniformity across Air Force operations and address operational challenges in austere environments. This FY26 requirement seeks to reprocure engines previously justified under the same limited sources authority. The justification is to be made publicly available with the associated solicitation as required by FAR 13.501(a)(1)(iv). The Point of Contact is Michael McDowell Jr., 240-857-9541.