Allison 250 Third Stage Shield | P/N 6847143

The Allison 250 Third Stage Shield, Part Number 6847143 (NSN 2840-00-941-8747), is a critical aircraft turbine engine component designed for installation within the compressor section of the Allison 250 engine family. Third stage shields are used to provide mechanical protection, airflow management support, and thermal shielding for surrounding compressor components operating under demanding conditions.

Within a turbine engine, the compressor section is exposed to high rotational speeds, elevated temperatures, and continuous airflow. The third stage shield plays an important role in protecting adjacent components from excessive heat, airflow turbulence, and potential mechanical damage. By maintaining proper shielding and spacing, this component helps preserve compressor efficiency, component life, and overall engine reliability.

Part number 6847143 is manufactured to precise aerospace tolerances to ensure correct fitment and compatibility with approved Allison 250 engine configurations. Components in this area of the engine must maintain dimensional stability and structural integrity despite vibration, pressure changes, and thermal cycling encountered during normal operation. For this reason, third stage shields are typically produced from durable, heat-resistant materials designed to perform consistently throughout service life.

This component is associated with turbine engine platforms developed by Rolls-Royce, following the integration of Allison engine programs. The Allison 250 engine series is widely used across helicopter and light fixed-wing aircraft applications, making properly configured compressor components essential for continued operational safety and performance.

During maintenance, repair, or overhaul activities, third stage shields are inspected for signs of distortion, cracking, erosion, or heat damage that could affect compressor airflow or structural protection. Correct identification by part number and NSN ensures compatibility with approved engine manuals and maintenance documentation.

The Allison 250 Third Stage Shield 6847143 is suitable for use by MRO facilities, aviation operators, and parts distributors supporting Allison / Rolls-Royce turbine engine programs. Final determination of serviceability and approval for return to service must be made by qualified aviation maintenance personnel in accordance with applicable engine manuals and regulatory authority requirements.

The Allison 250 3rd Stage Shield 6847143 (NSN 2840-00-941-8747) remains an essential component for maintaining compressor protection, engine efficiency, and long-term turbine engine reliability.