UNION

The MS21902D6 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 and Citation V, Ultra, Encore or Encore+. It carries an export classification of ECCN 9A991. Because the MS21902D6 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. 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. On a certificated airframe, part provenance matters as much as the part itself; genuine factory sourcing settles that question up front. An unapproved or surplus substitute can introduce fit, material, or paperwork problems that surface at the next inspection; the genuine part avoids that risk. Built by Textron Aviation, whose Cessna line was founded in Wichita, Kansas in 1927 and joined Textron in 1992, this part carries one of general aviation's most storied names. 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 MS21902D6 or browse more Cessna Citation parts on Flying411.