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38-0230021-00 - Whelen Position Light Lens Gasket W1283

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38-0230021-00 - Whelen Position Light Lens Gasket W1283
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38-0230021-00 - Whelen Position Light Lens Gasket W1283

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38-0230021-00 – Whelen Position Light Lens Gasket (W1283)

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The 38-0230021-00 (also identified by the Whelen engineering number W1283) is a precision-cut environmental seal designed for aircraft external navigation lighting. Manufactured by Whelen Aerospace Technologies (WAT), this gasket is the primary moisture and debris barrier for the W1283 series position light assemblies. It is seated between the light housing and the colored (Red, Green, or Clear) lens, ensuring that the internal electrical components, reflectors, and bulbs are protected from the harsh atmospheric conditions of high-altitude flight.

Constructed from a high-grade, UV-resistant elastomer (typically Silicone or Neoprene), the 38-0230021-00 is engineered to remain flexible across extreme temperature gradients. This prevents the "brittleness" and cracking common in standard rubber gaskets, which can lead to water ingress, short circuits, and "fogging" of the lens that reduces light intensity.

Key Features

  • Precision "Step-Cut" Geometry: Custom-molded to fit the specific flange of the Whelen W1283 lens, providing a uniform 360° seal that prevents moisture "wicking" into the assembly.

  • Aerospace-Grade Elastomer: Formulated to resist degradation from ozone, UV exposure, and common aviation chemicals such as de-icing fluids (Propylene Glycol) and hydraulic oils (Skydrol).

  • Vibration Dampening: Acts as a mechanical buffer between the rigid lens and the metal housing, reducing the likelihood of lens "crazing" or cracking due to airframe harmonics.

  • High Thermal Stability: Maintains seal integrity from the deep-freeze of -65°C at cruise altitude to the high-heat environment of a tarmac in summer.

  • Light-Leak Prevention: The opaque nature of the gasket material ensures that light is directed through the lens rather than escaping through the housing seams, maintaining the photometric accuracy required by TSO-C30c.

Technical Specifications

  • Part Number: 38-0230021-00

  • Alternate PN: W1283 (Gasket component)

  • Manufacturer: Whelen Aerospace Technologies (WAT)

  • Component Type: Lens Gasket / Environmental Seal

  • Material: Silicone or Synthetic Rubber (Black)

  • Thickness: Precision gauged for compression fit

  • Certification: FAA-PMA / Part 23 & 25 Certified

  • Application: Exterior Navigation (Position) Lights

Aircraft Compatibility

  • Beechcraft: King Air, Baron, and Bonanza series.

  • Cessna: 150, 172, 182, and 200/300/400 series twins.

  • Piper: Cherokee, Seneca, and Navajo series.

  • General Aviation: Virtually any aircraft utilizing the industry-standard Whelen W1283 wing-tip or tail navigation light assemblies.

  • Note: This gasket is specifically for the W1283 lens style. If your light assembly uses the larger "Strobe/Nav" combo lens, verify the part number against your Illustrated Parts Catalog (IPC) Section 33-40.

Applications

The 38-0230021-00 is utilized for External Lighting Integrity. Its primary roles include:

  • Water Ingress Protection: Preventing rain and condensation from reaching the bulb socket and causing corrosion.

  • Optical Clarity Maintenance: Keeping dust and exhaust soot out of the reflector assembly to ensure maximum light output.

  • Lens Preservation: Providing a soft seating surface that prevents the mounting screws from over-stressing the plastic lens during installation.

Why Choose 38-0230021-00?

Choosing the genuine Whelen 38-0230021-00 is essential for Long-Term Reliability. While many operators attempt to use RTV silicone or "homemade" gaskets, these methods often fail because they don't account for the Compression Set required to maintain a seal under the varying air pressures of flight. The W1283 gasket is designed with a specific Durometer (Hardness) that allows the lens screws to be torqued to spec without "extruding" the gasket out of the side of the housing.

The 38-0230021-00 functions as a Boundary Seal governed by the physics of Elastomeric Compression. To be effective, the gasket must be compressed by approximately 20-30% of its original thickness. This creates a high-pressure contact zone that exceeds the external air pressure, preventing water from being "forced" into the light during high-speed flight through rain. The material’s Coefficient of Thermal Expansion is matched to the acrylic lens and aluminum housing, ensuring that the seal does not "open up" when the aircraft moves from a hot hangar to a freezing cruise altitude.

Note: This is a maintenance-critical exterior component. Installation should be performed by a certified A&P/AME. Prior to installation, ensure the lens and housing mating surfaces are clean and free of old gasket residue. Do not over-torque the lens screws, as this can crack the lens or distort the gasket. It is recommended to replace this gasket every time the lens is removed for a bulb change to ensure continued moisture protection.

Documentation


Applicable Aircraft.

  • Citation XLS, XLS+ or XLS Gen2
  • Stationair
  • Various Diamond Aircraft