BARREL

The MS21251-5S is a genuine Textron Aviation barrel supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It fits the 1900 Airliner, 1900C Airliner, 1900D Airliner, Citation CJ4, CJ4 Gen 2, CJ4 Gen 3, Citation Latitude, Citation V, Ultra, Encore or Encore+, King Air 350 Fusion, King Air 350C FM-36 & On, King Air 350C Fusion, and King Air 350i, among other compatible variants. It carries an export classification of ECCN EAR99. As an original-equipment (OEM) part supplied directly by Textron Aviation, the MS21251-5S 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 Beechcraft 1900, Cessna Citation, and Beechcraft King Air aircraft share extensive structure and hardware, a single part like this is often common across several variants. Supplied as a defined part in the manufacturer's catalog, its exact role is set by the aircraft's parts and maintenance data. For a regulated aircraft component, correct identification by factory part number is what guarantees the exact form, fit, and function the design calls for. These aircraft are built by Textron Aviation, which unites Cessna (founded 1927) and Beechcraft (founded 1932) under one Wichita, Kansas company since 2014. Derived from the King Air, the 19-passenger Beechcraft 1900 airliner (built 1982–2002) remains in service with regional and cargo operators. To check availability, request a quote for MS21251-5S or browse more Beechcraft 1900, Cessna Citation, and Beechcraft King Air parts on Flying411.