?unique=4e19484)
300124-2 – Bombardier OEM Seal for Learjet Aircraft
Available now on the Airparts.aero Marketplace.
Overview
The Bombardier 300124-2 is a genuine OEM, flight-critical flap leading edge seal, an essential aerodynamic component for the high-performance wing of the Learjet 40, 45, and 75 series of business jets. This is not a simple weatherstrip; it is a precision-extruded, high-performance elastomeric seal designed to bridge the gap between the underside of the wing's trailing edge and the leading edge of the Fowler flaps when they are retracted. Its primary function is to create a smooth, continuous aerodynamic surface, reducing drag and preventing air from leaking from the high-pressure lower wing surface to the low-pressure upper surface.
The integrity of this seal is fundamental to the aircraft's aerodynamic efficiency and clean-wing flight performance. As a genuine Bombardier OEM part, it guarantees the correct material composition, durometer (hardness), and aerodynamic profile required for this critical application on a high-speed jet aircraft.
Key Features
Aerodynamic Drag Reduction: The seal's primary function is to create a perfectly faired surface over the flap-to-wing junction. This prevents the formation of turbulent airflow and parasitic drag when the flaps are retracted, which is essential for achieving optimal cruise speed and fuel efficiency.
High-Performance Elastomer: Fabricated from a specialized, aerospace-grade synthetic rubber compound. This material is chosen for its exceptional resistance to aerodynamic abrasion, UV radiation, ozone, and its ability to remain flexible and resilient across the extreme temperature range of high-altitude flight.
Precision Extrusion Profile: Manufactured with a specific and complex cross-sectional profile. This shape is engineered to provide a positive seal against the flap's leading edge while being able to compress and decompress through thousands of flap extension/retraction cycles without taking a permanent set.
Vibration Damping: Helps to prevent high-frequency vibration and "buzz" at the flap and wing trailing edge interface, contributing to a quieter cabin and reducing fatigue on the surrounding airframe structure.
Genuine Bombardier OEM Part: As a genuine factory component, it guarantees the exact extrusion profile and material properties required by the aircraft's original Type Certificate, ensuring a perfect, airworthy fit.
Technical Specifications
Part Number: 300124-2
Component Type: Flap Leading Edge Aerodynamic Seal
Material: High-Performance, Weather-Resistant Synthetic Rubber (Elastomer)
Primary Function: Aerodynamic sealing of the retracted flap-to-wing gap.
Installation: Slides into a dedicated channel on the wing's rear spar or trailing edge structure.
Certification: FAA / TCCA Production Approval
Aircraft Compatibility
The 300124-2 is the specified OEM flap leading edge seal for the highly successful Learjet 40 and 45 family of business jets.
Primary Aircraft Models:
Bombardier Learjet 40 / 40XR
Bombardier Learjet 45 / 45XR
Bombardier Learjet 70 / 75
Applications
The 300124-2 is a critical airframe component for aerodynamic performance and structural integrity:
Airframe Maintenance: A standard inspection item during detailed phase inspections. The seal must be replaced if it is found to be cracked, hardened, shrunk, torn, or no longer providing an effective aerodynamic seal.
Performance Restoration: Replacing worn or damaged flap seals is a key step in restoring an aircraft to its optimal aerodynamic profile and reducing cabin noise.
Major Structural & Wing Repair: A mandatory replacement item whenever the flaps are removed for service or major work is performed on the wing's trailing edge.
Why Choose 300124-2?
A damaged or missing flap seal on a high-speed jet is a significant source of parasitic drag, leading to increased fuel burn and reduced range. It can also create an aerodynamic whistle that is audible in the cabin and can allow water and de-icing fluids to penetrate the wing structure, leading to corrosion. Using a genuine Bombardier 300124-2 OEM seal is the only way to ensure the part has the correct, certified aerodynamic profile and material to create a lasting, effective seal, protecting the performance and value of your aircraft.
The 300124-2 flap seal is a crucial aerodynamic "fairing." The Fowler flaps on a Learjet 45 extend aft and then down. This creates a gap, or slot, between the wing's trailing edge and the flap's leading edge. While this slot is aerodynamically desirable when the flaps are extended (as it energizes the airflow over the flap), it must be perfectly sealed when the flaps are retracted for high-speed flight. The 300124-2 seal is designed to be compressed by the leading edge of the flap as it retracts into the wing cove. This action creates a smooth, uninterrupted surface for the air to flow over. The material's specific durometer and "compression set resistance" are critical, as the seal must provide a firm seal but also rebound to its original shape every time the flaps are extended, without becoming permanently deformed.
Note: This is a primary airframe component. Installation must be performed by a certified AME or A&P mechanic with experience in Learjet structures, in strict accordance with the current Bombardier maintenance manual. Proper installation may require specialized adhesives or tools to ensure it is correctly seated in its retaining channel.
