Description
The MS21151-1 is a genuine Textron Aviation bearing that supports rotational or pivoting motion within a mechanism. It fits the 1900 Airliner, 1900C Airliner, 1900D Airliner, Citation X, Citation X+, and Super King Air 350. It carries an export classification of ECCN EAR99, weighs 0.04 pounds, and measures 1.75 (L) x 0.7 (W) x 0.5 (H) Inches.
Because the MS21151-1 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.
Parts like this are shared across the Beechcraft 1900, Cessna Citation, and Beechcraft King Air aircraft, reflecting how much structure and hardware these models have in common.
Bearings and bushings are specified for their load, fit, and motion, so the correct part preserves smooth, reliable operation and expected wear life. For a regulated aircraft component, correct identification by factory part number is what guarantees the exact form, fit, and function the design calls for.
Genuine factory parts carry the documentation and traceability that maintenance and airworthiness records depend on — assurance a look-alike substitute cannot provide.
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.
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