Description
The MS21242S4 is a genuine Textron Aviation bearing — a low-friction pivot or rotational support in an assembly. It fits the Citation III, VI or VII. It carries an export classification of ECCN 9A991.
Supplied directly by Textron Aviation as an original-equipment (OEM) part, the MS21242S4 meets the manufacturer's specification and keeps the aircraft configuration-correct, with clean traceability in the maintenance records.
Parts like this are shared across the Cessna Citation aircraft, reflecting how much structure and hardware these models have in common.
Fit and load rating define a bearing's job, so matching the specified part protects both function and service life. Sourcing the OEM part protects the airframe's configuration and keeps its service history consistent, which matters for both airworthiness and resale value.
Because aircraft parts are governed by strict airworthiness and traceability rules, fitting the OEM part rather than an unapproved equivalent keeps the installation eligible and the aircraft's records clean. Genuine sourcing means the part matches the drawing exactly, so fit and function are known quantities rather than a gamble at installation.
The Cessna name is among the most recognized in aviation — founded in Wichita, Kansas in 1927 and part of Textron since 1992, today a cornerstone of Textron Aviation. Cessna's Citation line, launched with the Model 500 in the early 1970s, grew into the best-selling business-jet family in the world, spanning today from the light M2 to the super-midsize Longitude.
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