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GM137-1405-10 – Bombardier OEM Right-Hand Aerodynamic Side Seal
Available now on the Airparts.aero Marketplace.
The GM137-1405-10 is a precision-engineered, flight-critical aerodynamic seal designed specifically for the right-hand (RH) side of the fuselage or pylon interface on Bombardier Challenger and Global series aircraft. As the high-number variant in the GM137-1405 series, the "-10" seal is a vital component for maintaining symmetrical laminar flow at the rear airframe stations. By closing the mechanical gaps between the engine pylon, nacelle fairings, and the fuselage skin, this seal eliminates "parasitic drag" and provides a robust environmental barrier against moisture and de-icing fluid ingress.
Constructed from a specialized reinforced fluorosilicone elastomer, the GM137-1405-10 is built to withstand the high-vibration environment of a turbine engine pylon. It maintains its structural integrity and flexibility across the extreme thermal gradients of long-range flight, from the cryogenic cold of high-altitude cruise to the intense "soak-back" heat experienced at the engine interface during ground operations.
Key Features
Precision RH Contoured Profile: Specifically molded to match the unique curvature of the right-side airframe geometry, ensuring a "zero-step" aerodynamic transition between panels.
Reinforced Matrix Core: Features an internal fabric or mesh "scrim" (typically polyester or fiberglass) that provides the tensile strength required to resist "lifting" or "peeling" at high Mach numbers.
Skydrol and Fuel Resilience: Formulated to resist swelling, softening, or chemical degradation when exposed to Phosphate Ester hydraulic fluids (Skydrol LD-4/5) or Jet-A1 fuel.
Compression Set Resistance: The high-quality silicone core is designed to "spring back" after thousands of pressurization cycles, ensuring a tight seal as the airframe skin "breathes" during flight.
UV and Ozone Shielding: Chemically stabilized to prevent "chalking" and "embrittlement" caused by intense solar radiation at high altitudes.
Technical Specifications
Part Number: GM137-1405-10
Manufacturer: Bombardier Aerospace (OEM)
Component Type: RH Aerodynamic Side Seal / Pylon Fairing Seal
Material: Reinforced Fluorosilicone / Silicone
Position: Right-Hand (RH) Side
Finish: Smooth, Low-Friction Coated
Certification: FAA-PMA / EASA Form 1 (with OEM Traceability)
Standard: Compliant with Bombardier BAMS material specifications.
Aircraft Compatibility
Bombardier Challenger Series: 604, 605, 650.
Bombardier Global Series: 5000, 6000 (Express/XRS).
Note: The -10 seal is a position-specific "handed" part. Always verify your aircraft’s station number in the Illustrated Parts Catalog (IPC) Section 53 (Fuselage) or Section 71 (Powerplant) to confirm this matches your RH pylon or fairing assembly.
Specifically for:
- Global 5000
- Global 5500
- Global 6000
- Global 6500
- Global Express
- Global Express Extended Range
- Global Vision G5000
Applications
The GM137-1405-10 is utilized for Boundary Layer Control and Environmental Protection. Its primary roles include:
Pylon-to-Fuselage Sealing: Minimizing turbulence at the high-stress junction where the engine pylon meets the rear fuselage.
Nacelle Fairing Seal: Providing a smooth bridge between engine cowlings and fixed pylons to optimize engine cooling and drag profiles.
Corrosion Inhibition: Acting as a moisture barrier to prevent water, salt, and de-icing fluids from reaching the aluminum substructure.
Why Choose GM137-1405-10?
Choosing the genuine Bombardier GM137-1405-10 is essential for Fuel Efficiency and Noise Suppression. An improperly fitted or non-OEM seal can cause "flow separation," leading to an increased Drag Coefficient ($C_d$) and higher fuel burn. Furthermore, the GM137-1405-10 is designed with a specific Durometer (Hardness) that provides the ideal balance between a watertight seal and enough flexibility to accommodate airframe flex during high-G maneuvers or turbulence.
The GM137-1405-10 functions on the principle of Laminar Flow Continuity. At cruise speeds, any gap or step in the airframe creates a Turbulent Wake. This seal ensures the Reynolds Number ($Re$) remains within the laminar profile across panel transitions. The physics of the seal’s Compression Set are vital; it must retain its "spring-back" force throughout the fuselage's expansion/contraction cycles ($P_{cabin}$ vs $P_{ambient}$). This is achieved via the reinforced silicone matrix, which provides the modulus of elasticity required to maintain a seal even as the airframe skin "breathes" during flight.
Note: This is a flight-critical aerodynamic component. Prior to installation, the mounting area must be "surgical-clean," free of old sealant and oils. Use only the specific Bombardier-approved bonding agent (e.g., 3M 1300L) or hardware. Do not over-compress the seal during installation. Inspect for "lifting" or "fraying" during every pre-flight walkaround, as a loose seal can be ingested into the engine intake.
