STIFFENER

The 99-120020-36 is a genuine Textron Aviation stiffener that reinforces a skin or spar and helps carry loads through the airframe. It is fitted to the King Air 100. Because the 99-120020-36 is an original-equipment (OEM) structural component from Textron Aviation, it is built to the airframe manufacturer's specification and matches the type design as documented. Fitting the genuine part preserves the wing or airframe's engineered strength and keeps installation and inspection records clean. Across the Beechcraft King Air fleet, correctly identified factory parts like this keep every airframe consistent and configuration-correct. 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. Using the factory part number preserves configuration control, so the airframe stays consistent with its approved type design and the work is straightforward to sign off at inspection. Because this is a component for a type-certificated aircraft, using the manufacturer's part keeps the installation within approved configuration and simplifies compliance. Because substitutions on type-certificated aircraft require approved data, the genuine part is the straightforward, compliant choice for this application. Built by Beechcraft — the Wichita, Kansas manufacturer founded in 1932 and part of Textron Aviation since 2014 — this part carries a name long associated with rugged, capable aircraft. The King Air first flew in 1964 and became the best-selling business turboprop in history — still built today as the King Air 260 and 360. To check availability, request a quote for 99-120020-36 or browse more Beechcraft King Air parts on Flying411.