THERMAL RELIEF PLUG (P/N 49-139) - New
P/N: 49-139
Category: Connectors & Contacts
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Available Inventory
| Condition | Price | Stock |
|---|---|---|
| New | $35.00 | 1 Available |
Product Description
The 49-139 is a thermal relief plug (fusible plug) installed in aircraft wheel hub ports to vent tire pressure at a preset temperature. When wheel temperatures exceed safe limits during landing or braking, the plug activates and releases pressurized air, reducing burst risk. Used in Bombardier Learjet 40/45 landing gear assemblies.
The plug requires replacement after activation or during routine tire service. Installation follows the aircraft maintenance manual and FAA AC 43.13-1B guidance, with specific torque specifications for the wheel hub port.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the THERMAL RELIEF PLUG (P/N 49-139)?
The 49-139 is a thermal relief plug (fusible plug) installed in aircraft wheel hub ports to vent tire pressure at a preset temperature. When wheel temperatures exceed safe limits during landing or braking, the plug activates and releases pressurized air, reducing burst risk.
Is the 49-139 compatible with my aircraft's avionics suite?
Avionics compatibility depends on your aircraft model and existing installation. The THERMAL RELIEF PLUG is available in: New. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.
Does the 49-139 come with an 8130-3 airworthiness tag?
Availability of an FAA 8130-3 tag depends on the part condition. Overhauled and repaired units typically include 8130-3 documentation. As-removed units may include a removal tag with trace history. Contact us for specific documentation on the condition you need.
Do you offer bench testing for the 49-139?
We can arrange bench testing through our network of FAA-certified repair stations. Call (904) 998-9101 for testing availability and turnaround times, or submit an RFQ with your specific requirements.
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