Description
The MS21912J6 is a genuine Textron Aviation tee supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It fits the Citation III, VI or VII. It carries an export classification of ECCN 9A991.
Because the MS21912J6 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 aircraft share extensive structure and hardware, a single part like this is often common across several variants.
Structural parts like this carry and transfer loads through the airframe, so exact form and fit are essential to preserving the design's strength and fatigue life. OEM parts arrive to the specification the type design was certified against, preserving both airworthiness and the airframe's documented configuration.
On a certificated airframe, part provenance matters as much as the part itself; genuine factory sourcing settles that question up front. An unapproved or surplus substitute can introduce fit, material, or paperwork problems that surface at the next inspection; the genuine part avoids that risk.
Cessna traces to the company Clyde Cessna founded in Wichita, Kansas in 1927; Textron Inc. acquired it in 1992, and since 2014 it has anchored Textron Aviation alongside Beechcraft and Hawker. 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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