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101-420132-54 – Textron Aviation OEM Wing and Fuselage Extension Fairing Assembly
Available now on the Airparts.aero Marketplace.
The Textron Aviation 101-420132-54 is a flight-critical, OEM-certified aerodynamic fairing assembly designed to manage the complex airflow at the wing-root-to-fuselage interface. As the starboard (right-hand) counterpart to the -53 assembly, this extension fairing is meticulously engineered to minimize interference drag, which occurs where two aerodynamic surfaces meet at an angle. By providing a precision-contoured transition, the 101-420132-54 preserves laminar flow across the wing root and prevents the development of turbulent wake eddies that can compromise fuel efficiency and increase parasite drag.
Fabricated to meet the rigorous structural standards of high-performance turboprop aircraft, this assembly is typically constructed from aerospace-grade aluminum alloys such as 2024-T3 or advanced composites, depending on the specific aircraft serial block. The 101-420132-54 is essential not only for aerodynamic efficiency but also for protecting the underlying primary structural attachment points—including wing-to-fuselage bolts and spar fittings—from moisture ingress, environmental debris, and aerodynamic buffet. For operators of the Beechcraft King Air series, this OEM assembly ensures that the aircraft maintains its original type-certified performance and stall characteristics.
Key Features
Optimized Aerodynamic Profile: Designed using original lofting data to provide a seamless transition between the wing trailing edge and the fuselage skin, significantly reducing interference drag.
High-Strength/Lightweight Construction: Manufactured from 2024-T3 Alclad or specialized composites to offer superior fatigue resistance and durability under the high-pressure loads of cruise flight.
Integrated Fastener Reinforcements: Features precision-drilled and reinforced mounting holes compatible with NAS (National Aerospace Standard) hardware for secure attachment.
OEM Corrosion Protection: Factory-primed with high-quality chromated or non-chromated epoxy primers to prevent galvanic corrosion and environmental degradation.
Vibration and Buffet Resistance: Engineered to maintain structural rigidity, preventing "oil-canning" and vibration-induced fatigue cracks in the high-velocity slipstream of a turboprop engine.
Technical Specifications
Part Number: 101-420132-54
Component Type: Wing and Fuselage Extension Fairing (Right-Hand/Starboard)
OEM Manufacturer: Textron Aviation (Beechcraft)
Material: Aerospace-grade Aluminum (2024-T3) or Composite (per specific IPC)
Finish: Zinc Chromate or Epoxy Polyamide Primer
Orientation: Right-Hand (RH) Assembly
Installation: Wing Root / Fuselage Junction
Governing Specifications: Textron Aviation Engineering Standards
Certification: OEM Original Equipment
Aircraft Compatibility
Beechcraft King Air Series: Extensively used on the King Air 200, B200, 300, and B300 (350) models.
Textron Aviation Model 1900/1900D: Specific applications within the 1900-series regional turboprop fleet.
Note: The aircraft’s Illustrated Parts Catalog (IPC) or Structural Repair Manual (SRM) is the final authority for verifying the 101-420132-54's compatibility with your specific tail number and serial range.
Applications
The 101-420132-54 serves as a Primary Aerodynamic Interface. Its role is to smooth the transition of airflow over the junction where the wing trailing edge meets the fuselage. By controlling the Boundary Layer behavior in this region, it prevents flow separation that would otherwise result in a significant drag penalty and potential impact on the aircraft's longitudinal stability at high angles of attack.
Why Choose 101-420132-54?
Selecting the genuine Textron 101-420132-54 ensures that your aircraft operates within its original aerodynamic design envelope. Aftermarket or non-certified fairings may lack the internal stiffening or precise curvature required to prevent aerodynamic "buzz" or localized structural fatigue. Using an OEM assembly guarantees a "snap-fit" installation, reducing labor hours and ensuring the long-term integrity of the wing-to-fuselage attachment.
The 101-420132-54 is a critical element in the management of aerodynamic interference and Horseshoe Vortex mitigation. In fluid dynamics, the intersection of two surfaces creates a localized adverse pressure gradient that thickens the boundary layer, leading to increased parasite drag. This fairing is designed using computational fluid dynamics (CFD) to maintain a favorable pressure gradient, smoothing the velocity profile as airflow accelerates between the fuselage and the wing. The choice of 2024-T3 Alclad provides the necessary fracture toughness and modulus of elasticity to withstand the aeroelastic loads generated by the propeller wash. Furthermore, the assembly ensures the joint remains statically determinate, protecting the primary wing spar attachments from the pitting corrosion and crevice corrosion that can occur in unsealed structural junctions.
Note: This is a structural aerodynamic fairing. Installation must be performed by a certified A&P mechanic in accordance with the Structural Repair Manual (SRM). Proper application of aerodynamic sealant (e.g., MIL-S-8802) is required to prevent moisture entrapment. Inspect the fairing regularly for fastener integrity and signs of crack initiation, especially in high-vibration zones near the engine exhaust path.
