Size (CM): 410*380*300

Weright (KG): 1550

J78031-146 is a precision-machined aerospace engine fan frame seal assembly, compliant with AS9100D quality standards and FAA/EASA regulations, optimized for CFM56 and IAE V2500 turbofan engines. It seals the gap between the fan frame and the engine's core casing, preventing the bypass airflow (the majority of the fan's generated airflow) from leaking into the engine core, which maintains the bypass ratio, improves engine thrust efficiency, and reduces fuel consumption across all flight phases.

Made from a flexible, heat-resistant silicone composite with a reinforced metal mounting base, it withstands operating temperatures from -55°C to 220°C and continuous vibration. Weighing 0.42kg with a snap-fit installation design, it enables fast replacement during fan section MRO overhauls. FAA Part 25 certified, it is a key component for fan system airflow management and engine operational efficiency.