Description
The MS21231-9 is a genuine Textron Aviation bearing that supports rotational or pivoting motion within a mechanism. It fits the Beechjet 400/400A.
Because the MS21231-9 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 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. Because this is a component for a type-certificated aircraft, using the manufacturer's part keeps the installation within approved configuration and simplifies compliance.
On a certificated airframe, part provenance matters as much as the part itself; genuine factory sourcing settles that question up front. Traceable OEM hardware keeps an aircraft's maintenance records defensible at annual, pre-purchase, and pre-buy inspections.
Because substitutions on type-certificated aircraft require approved data, the genuine part is the straightforward, compliant choice for this application.
Built by Beechcraft — the Wichita, Kansas manufacturer founded in 1932 and part of Textron Aviation since 2014 — this part carries a name long associated with rugged, capable aircraft. The Beechjet 400, which began life as the Mitsubishi Diamond and later became the Hawker 400, is a light business jet supported today through Textron Aviation.
Request a quote for MS21231-9 or browse more Beechcraft parts on Flying411.
