CLAMP

The S1891-40 is a genuine Textron Aviation clamp used to fasten, secure, or retain components during assembly of the airframe. It fits the Citation Sovereign or Sovereign+, Citation V, Ultra, Encore or Encore+, Citation X, Citation X+, Skyhawk, and Stationair. It carries an export classification of ECCN EAR99. As an original-equipment (OEM) part supplied directly by Textron Aviation, the S1891-40 is built to the aircraft maker's specification and cross-references the type design as documented in the maintenance data. Choosing the genuine part over an unapproved substitute preserves configuration control and simplifies inspection sign-offs. Across the Cessna Citation, Skyhawk, and Stationair fleet, correctly identified factory parts like this keep every airframe consistent and configuration-correct. Aircraft hardware is called out to a specific specification for each location; an off-the-shelf equivalent is rarely acceptable. Because this is a component for a type-certificated aircraft, using the manufacturer's part keeps the installation within approved configuration and simplifies compliance. 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. The Citation family is the best-selling line of business jets ever built, and more than 7,500 have been delivered worldwide. Request a quote for S1891-40 or browse more Cessna Citation, Skyhawk, and Stationair parts on Flying411.