UNION

The MS21902D8 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 III, VI or VII, Citation Latitude, Citation Sovereign or Sovereign+, Citation X, Citation X+, and Premier Model 390. It carries an export classification of ECCN 9A991. As an original-equipment (OEM) part supplied directly by Textron Aviation, the MS21902D8 is built to the aircraft maker's specification and cross-references the type design as documented in the maintenance data. Choosing the genuine part over an unapproved substitute preserves configuration control and simplifies inspection sign-offs. Because the Cessna Citation and Beechcraft Premier 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. The factory part is built to the manufacturer's material and dimensional specification, so it installs as designed without the surprises a generic equivalent can bring. Both the Cessna and Beechcraft lines are supported today by Textron Aviation, formed in 2014 to unite the two historic Wichita manufacturers with Hawker. Cessna's Citation line, launched with the Model 500 in the early 1970s, grew into the best-selling business-jet family in the world, spanning today from the light M2 to the super-midsize Longitude. To check availability, request a quote for MS21902D8 or browse more Cessna Citation and Beechcraft Premier parts on Flying411.