Description
The MS21251B5L is a genuine Textron Aviation barrel supplied for use on the aircraft, with its precise function defined by the aircraft's parts data. It is fitted to the Baron Series B55, E55, 58 or G58, Bonanza 36, Bonanza F33, G33, F33A or F33C, Citation CJ1 or CJ1+, Citation CJ2 or CJ2+, Citation CJ3, CJ3+, CJ3+ Gen 2, CJ3 Gen 3, Citation CJ4, CJ4 Gen 2, CJ4 Gen 3, Citation Excel, XLS, XLS+, XLS Gen 2, Citation M2, M2 Gen 2, M2 Gen 3, and Citation Mustang, among other compatible variants. It carries an export classification of ECCN EAR99, weighs 0.10 lbs, and measures 4 (L) x 0.4 (W) x 0.45 (H) in.
As an original-equipment (OEM) part supplied directly by Textron Aviation, the MS21251B5L 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.
Parts like this are shared across the Beechcraft Baron, Beechcraft Bonanza, Cessna Citation, Beechcraft King Air, Beechcraft Premier, and Cessna Skylane aircraft, reflecting how much structure and hardware these models have in common.
Supplied as a defined part in the manufacturer's catalog, its exact role is set by the aircraft's parts and maintenance data.
These aircraft are built by Textron Aviation, which unites Cessna (founded 1927) and Beechcraft (founded 1932) under one Wichita, Kansas company since 2014. The Baron — a twin-engine member of Beechcraft's piston line introduced in 1961 — shares much of its structure and hardware with the Bonanza.
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