EASA SIB NE-16-22: Pratt & Whitney JT8D-200 series engines - Turbine Engine Combustion Section

What to do

Operators should review engine service records to identify combustion chambers repaired by ATI from June 2005 to October 2012. If found, they should perform initial and repetitive torque inspections at reduced intervals as guided by AD 2011-07-02 and their maintenance programs. Additionally, removal and detailed inspection of suspect combustion chambers are recommended at the earliest opportunity.

Summary

The FAA Special Airworthiness Information Bulletin SAIB: NE-16-22 provides information about potential low-pressure turbine (LPT) stage 4 blade failures in Pratt & Whitney JT8D-200 series turbofan engines, specifically models JT8D-209, -217, -217A, -217C, and -219. The bulletin highlights issues related to combustion chambers repaired by Aircraft Technology Inc. (ATI) that may have been returned to service outside published repair limits, leading to increased blade wear and fatigue. This information is intended for owners, operators, and repair facilities of affected engines.

What changed

This bulletin introduces an alert regarding the increased risk of LPT stage 4 blade failure due to combustion chambers repaired by ATI between June 2005 and October 2012. It emphasizes the need for reduced torque inspection intervals and recommends removal and inspection of suspect combustion chambers. The bulletin does not mandate regulatory action but provides guidance to mitigate the risk.

Why it matters

This information is critical for aviation professionals to prevent potential engine failures caused by high-cycle fatigue in LPT blades, which could impact engine reliability and safety. Operators and maintenance organizations must be aware of the risks associated with ATI-repaired combustion chambers to ensure timely inspections and avoid in-service failures. Compliance teams need to track affected engines and adjust maintenance programs accordingly.