Description
The MS21915D6-4 is a genuine Textron Aviation bushing that protects and locates a shaft, pin, cable, or cord where it passes through structure. It is fitted to the Citation III, VI or VII. It carries an export classification of ECCN EAR99.
Because the MS21915D6-4 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.
Parts like this are shared across the Cessna Citation aircraft, reflecting how much structure and hardware these models have in common.
A bearing or bushing sets how a shaft or pivot moves and wears; the right part keeps that motion as designed. Genuine factory parts carry the documentation and traceability that maintenance and airworthiness records depend on — assurance a look-alike substitute cannot provide.
An unapproved or surplus substitute can introduce fit, material, or paperwork problems that surface at the next inspection; the genuine part avoids that risk. Because substitutions on type-certificated aircraft require approved data, the genuine part is the straightforward, compliant choice for this application.
Built by Textron Aviation, whose Cessna line was founded in Wichita, Kansas in 1927 and joined Textron in 1992, this part carries one of general aviation's most storied names. 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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