Description
The MS21904-4T is a genuine Textron Aviation elbow supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It fits the Citation Latitude and Citation Sovereign or Sovereign+. It carries an export classification of ECCN 9A991.
Because the MS21904-4T 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.
As a factory-supplied item for a type-certificated aircraft, this part is defined by the manufacturer's specification and applicability data. The factory part is built to the manufacturer's material and dimensional specification, so it installs as designed without the surprises a generic equivalent can bring.
On a certificated airframe, part provenance matters as much as the part itself; genuine factory sourcing settles that question up front.
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. 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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