Description
The MS21251-3S is a genuine Textron Aviation turnbuckle supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It is fitted to the Citation Longitude, King Air 100, and King Air C90, C90A, C90GT or E90. It carries an export classification of ECCN EAR99.
As an original-equipment (OEM) part supplied directly by Textron Aviation, the MS21251-3S 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 Cessna Citation and Beechcraft King Air 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. Genuine factory parts carry the documentation and traceability that maintenance and airworthiness records depend on — assurance a look-alike substitute cannot provide.
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.
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