REDUCER

The MS21916J6-4 is a genuine Textron Aviation reducer supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It is fitted to the Citation CJ4, CJ4 Gen 2, CJ4 Gen 3, 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 EAR99, weighs 0.07 pounds, and measures 1.2 (L) x 0.9 (W) x 0.85 (H) Inches. Because the MS21916J6-4 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 and Beechcraft Premier aircraft share extensive structure and hardware, a single part like this is often common across several variants. As a factory-supplied item for a type-certificated aircraft, this part is defined by the manufacturer's specification and applicability data. Because this is a component for a type-certificated aircraft, using the manufacturer's part keeps the installation within approved configuration and simplifies compliance. Because substitutions on type-certificated aircraft require approved data, the genuine part is the straightforward, compliant choice for this application. These aircraft are built by Textron Aviation, which unites Cessna (founded 1927) and Beechcraft (founded 1932) under one Wichita, Kansas company since 2014. 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 MS21916J6-4 or browse more Cessna Citation and Beechcraft Premier parts on Flying411.