Description
The S1891-56S is a genuine Textron Aviation clamp used to fasten, secure, or retain components during assembly of the airframe. It is fitted to the Caravan or Grand Caravan EX, Citation CJ2 or CJ2+, Citation CJ3, CJ3+, CJ3+ Gen 2, CJ3 Gen 3, Citation Excel, XLS, XLS+, XLS Gen 2, Citation X, Skyhawk, Skylane, and Stationair. It carries an export classification of ECCN 9A991.
Because the S1891-56S 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 Caravan, Citation, Skyhawk, Skylane, and Stationair aircraft share extensive structure and hardware, a single part like this is often common across several variants.
Strength grade and finish define aircraft hardware, so matching the specified part keeps the joint as designed. 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.
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 single-engine Caravan turboprop, in production since 1984, is one of the most widely used utility aircraft in the world.
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