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101-420132-53 – Textron Aviation OEM Wing and Fuselage Extension Fairing Assembly
Available now on the Airparts.aero Marketplace.
The Textron Aviation 101-420132-53 is a flight-critical, OEM-certified fairing assembly designed to bridge the structural and aerodynamic interface between the wing root and the fuselage. In the complex airflow environment of high-performance turboprop aircraft, this extension fairing is responsible for managing the interference drag generated at the wing-to-body junction. By providing a smooth, kontour-matched transition, the 101-420132-53 ensures laminar flow preservation and prevents the formation of turbulent eddies that can significantly increase parasite drag and reduce overall fuel efficiency.
Fabricated from high-strength aerospace aluminum alloys or advanced composites (depending on the specific aircraft serial block), this fairing is engineered to withstand the high-frequency vibrations and varying pressure differentials encountered during high-altitude cruise and high-speed descent. The 101-420132-53 is not merely an aesthetic cover; it is a primary aerodynamic component that contributes to the aircraft's stall characteristics and longitudinal stability. For operators of Beechcraft King Air and other Textron utility aircraft, maintaining the structural integrity and precise fitment of this fairing is essential for ensuring type-certified performance and preventing long-term structural wear on the primary wing-attachment nodes.
Key Features
Aerodynamic Contour Optimization: Precision-formed to mitigate "interference drag," effectively smoothing the transition of high-velocity airflow over the wing-fuselage junction.
High-Strength Lightweight Construction: Utilizes 2024-T3 Alclad or equivalent high-grade alloys to provide superior fatigue resistance while maintaining an optimal strength-to-weight ratio.
Integrated Fastener Reinforcements: Features reinforced mounting points designed to interface with NAS-specification hardware, ensuring the assembly remains secure under aerodynamic buffet loads.
Corrosion-Resistant Priming: Factory-treated with a high-solids chromated or non-chromated primer (MIL-PRF-23377) to resist environmental degradation and moisture entrapment between the fairing and the primary structure.
Precise Dimensional Tolerance: Manufactured to OEM lofting data to ensure a "snap-fit" interface, reducing the need for excessive shimming or field-modification during installation.
Technical Specifications
Part Number: 101-420132-53
Component Type: Wing and Fuselage Extension Fairing
OEM Manufacturer: Textron Aviation (Beechcraft)
Material: Aerospace-grade Aluminum (typically 2024-T3) or Composite (Model dependent)
Finish: Zinc Chromate or Epoxy Polyamide Primer
Installation Position: Wing Root / Fuselage Transition (Left or Right - Verify via IPC)
Governing Specifications: Textron Aviation Engineering Standard
Certification: OEM Original Equipment / FAA-PMA Equivalent
Aircraft Compatibility
Beechcraft King Air Series: Extensively utilized on the King Air 200, B200, 300, and B300 (350) series.
Textron Aviation Model 1900/1900D: Specific regional configurations utilizing the King Air airframe architecture.
Note: The aircraft’s Illustrated Parts Catalog (IPC) or Structural Repair Manual (SRM) is the final authority for confirming the 101-420132-53's compatibility with your specific serial number and modification status.
Applications
The 101-420132-53 serves as a Primary Aerodynamic Interface. Its application is to streamline the junction between the wing trailing edge extension and the fuselage skin. By managing the Boundary Layer transition in this high-pressure zone, it protects the underlying primary wing-to-fuselage attachment bolts from moisture ingress and debris while maintaining the aircraft's aerodynamic efficiency.
Why Choose 101-420132-53?
Choosing a genuine Textron 101-420132-53 ensures that your aircraft maintains its original aerodynamic profile and stall safety margins. Aftermarket or "field-fabricated" fairings often lack the precise curvature and torsional rigidity required to prevent "oil-canning" or vibration-induced cracking at high airspeeds. A failure or loss of a fairing in flight can lead to severe aerodynamic imbalances and potential damage to the control surfaces or secondary structures. Using the OEM-certified assembly guarantees a precise fit, reducing labor time and ensuring the airframe remains within its type-certified design envelope.
The 101-420132-53 is a critical component for managing aerodynamic interference and the pressure gradient at the wing-body junction. From a fluid dynamics perspective, the fairing serves to minimize the displacement thickness of the boundary layer as it accelerates over the wing root. This prevents the formation of a Horseshoe Vortex, a common phenomenon at wing-body intersections that can lead to significant increases in induced drag. The material selection of 2024-T3 Alclad is specifically chosen for its fracture toughness and resistance to fatigue crack propagation, which is essential for a component subjected to the continuous pressure pulsations of turboprop slipstreams. The assembly's geometry is derived from computational fluid dynamics (CFD) modeling to ensure that the transition remains statically determinate and does not induce localized aeroelastic instabilities or "buzz" at high Indicated Airspeeds (KIAS).
Note: This is a structural aerodynamic component. Installation must be performed by a certified A&P mechanic in accordance with the Structural Repair Manual (SRM) or Aircraft Maintenance Manual (AMM). Special attention must be paid to the application of aerodynamic sealant (e.g., Pro-Seal) and the use of the correct NAS-specification fasteners to prevent corrosion and localized stress concentrations. Always inspect the fairing for signs of cracks or loose fasteners during every pre-flight and 100-hour inspection.
