UNION

The MS21902D10 is a genuine Textron Aviation union supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It is applicable to the Citation III, VI or VII, Citation X, Citation X+, and Premier Model 390. It carries an export classification of ECCN 9A991, weighs 0.06 pounds, and measures 1.2 (L) x 1.1 (W) x 1.6 (H) Inches. Because the MS21902D10 is an original-equipment (OEM) part sourced directly from Textron Aviation, it matches the exact specification and placement called out in the aircraft's type design and maintenance data — assurance a generic substitute cannot offer. Across the Cessna Citation and Beechcraft Premier fleet, correctly identified factory parts like this keep every airframe consistent and configuration-correct. Supplied as a defined part in the manufacturer's catalog, its exact role is set by the aircraft's parts and maintenance data. Because aircraft parts are governed by strict airworthiness and traceability rules, fitting the OEM part rather than an unapproved equivalent keeps the installation eligible and the aircraft's records clean. Fitting the correct factory part the first time avoids the rework, removal, and re-inspection that an incorrect or unapproved part can trigger. These aircraft are built by Textron Aviation, which unites Cessna (founded 1927) and Beechcraft (founded 1932) under one Wichita, Kansas company since 2014. The Citation family is the best-selling line of business jets ever built, and more than 7,500 have been delivered worldwide. Request a quote for MS21902D10, or browse more Cessna Citation and Beechcraft Premier parts on Flying411.