ADAPTER

The MS21900W4 is a genuine Textron Aviation adapter supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It is fitted to the Citation CJ3, CJ3+, CJ3+ Gen 2, CJ3 Gen 3, Citation CJ4, CJ4 Gen 2, CJ4 Gen 3, Citation Longitude, Citation Mustang, and Citation X. It carries an export classification of ECCN EAR99, weighs 0.02 pounds, and measures 0.65 (L) x 0.7 (W) x 1.25 (H) Inches. As an original-equipment (OEM) part supplied directly by Textron Aviation, the MS21900W4 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. Parts like this are shared across the Cessna Citation aircraft, reflecting how much structure and hardware these models have in common. As a factory-supplied item for a type-certificated aircraft, this part is defined by the manufacturer's specification and applicability 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. 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 MS21900W4, or browse more Cessna Citation parts on Flying411.