UNION

The MS21902W6 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 fitted to the Citation CJ4, CJ4 Gen 2, CJ4 Gen 3, Citation III, VI or VII, Citation Longitude, Citation V, Ultra, Encore or Encore+, Citation X, and Citation X+. It carries an export classification of ECCN EAR99, weighs 0.02 pounds, and measures 1.15 (L) x 0.9 (W) x 0.85 (H) Inches. Because the MS21902W6 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. Because the Cessna Citation aircraft share extensive structure and hardware, a single part like this is often common across several variants. This is a cataloged factory part whose form, fit, and function are established by the manufacturer's approved data. Genuine factory parts carry the documentation and traceability that maintenance and airworthiness records depend on — assurance a look-alike substitute cannot provide. Genuine sourcing means the part matches the drawing exactly, so fit and function are known quantities rather than a gamble at installation. The Cessna name is among the most recognized in aviation — founded in Wichita, Kansas in 1927 and part of Textron since 1992, today a cornerstone of Textron Aviation. 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 MS21902W6 or browse more Cessna Citation parts on Flying411.