Overview
The Fuel Hose Assembly (P/N LW-12799-6-090) is a critical component within the high-pressure fuel delivery system of Lycoming IO-720 series engines. This specific hose assembly is engineered to transfer fuel from the engine-driven fuel pump directly to the fuel manifold or individual fuel injectors, ensuring a consistent and reliable supply of fuel under pressure. Its primary role is to accommodate engine vibration and movement while maintaining fuel system integrity, preventing leaks, and supporting the precise fuel metering required for optimal engine performance and combustion.Specifications
This high-pressure fuel hose assembly is designed for the demanding environment of aircraft engine operation.- Part Number: LW-12799-6-090
- Manufacturer: Lycoming Engines
- Nominal Internal Diameter: 3/8 inch (indicated by the "-6" in the part number, signifying 6/16ths of an inch)
- Overall Length: Approximately 9.0 inches (indicated by the "-090" in the part number, signifying 9.0 inches)
- Construction: Typically features a smooth-bore PTFE (Polytetrafluoroethylene) inner tube for chemical resistance and low friction, reinforced with a high-strength stainless steel wire braid for burst pressure resistance and flexibility. An outer protective sleeve, often a silicone-impregnated fiberglass or similar material, may be included for abrasion and fire resistance.
- Fittings: Equipped with permanently swaged, corrosion-resistant end fittings, typically AN (Army-Navy) style or proprietary Lycoming designs, ensuring a secure, leak-proof connection to the fuel pump outlet and injector manifold inlet. Fittings are commonly constructed from stainless steel or anodized aluminum.
- Operating Pressure: Designed to withstand typical aircraft fuel injection system p
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: LW-12799-6-090
- Part#: LW-12799-6-090
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Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
