The Lycoming Engine System Fitting (P/N 2521196) is a critical component designed for the robust Lycoming O-320, IO-320, and LIO-320 series aircraft engines. This precisely manufactured fitting plays an integral role in maintaining the integrity and proper function of various engine systems, often involved in fluid transfer, pressure sensing, or sealing critical passages within the engine block or accessory case. Its reliability is paramount for sustained engine performance and operational safety.
Specifications
- Part Number: 2521196
- Manufacturer: Lycoming Engines
- Material: High-strength alloy steel (typical for Lycoming engine fittings, heat-treated for durability)
- Finish: Corrosion-resistant plating (e.g., cadmium or zinc-nickel, specific finish varies by production batch)
- Weight: Approximately 0.05 - 0.15 lbs (estimated, exact weight depends on specific fitting geometry)
- Dimensions: (Specific dimensions are proprietary and vary by fitting type; typically small, precision-machined threads and body for tight tolerances)
- Certification: FAA PMA Sub-Component (ensures airworthiness and direct replacement eligibility)
Aircraft Compatibility
This Lycoming Engine System Fitting, part number 2521196, is specifically engineered for a wide range of aircraft powered by the Lycoming O-320, IO-320, and LIO-320 engine series. These engines are widely utilized across various general aviation aircraft models, including but not limited to:
- Piper PA-28 Cherokee series (e.g., PA-28-140, PA-28-151, PA-28-161)
- Cessna 172 (later models with O-320 engines)
- Grumman American AA-5 Traveler/Tiger
- Mooney M20 series
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: 2521196
- Part#: 2521196
Aircraft Fitment Finder
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.
