Turbine Engine - Combustion Chamber Assembly - Inspection
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must perform fluorescent penetrant inspections of the CCA forward flange by July 23, 2025, and replace the assembly if any defects are found. Multiple inspections are permitted before reaching 25,000 part cycles since new, but the CCA must be replaced no later than 15,000 cycles after the last inspection before this threshold. Maintenance teams should also apply the updated definition of engine shop visits when scheduling inspections and repairs.
Summary
The Federal Aviation Administration's Airworthiness Directive 2025-12-08 addresses certain General Electric Company CF34-8 series engines, including models CF34-8C1 through CF34-8E6A1. This directive mandates inspections of the combustion chamber assembly (CCA) forward flange using fluorescent penetrant inspection (FPI) techniques to detect potential cracks and requires replacement if necessary. The AD aims to mitigate a predicted reduction in the cyclic life of the CCA forward flange to ensure continued airworthiness.
What changed
This new airworthiness directive introduces mandatory fluorescent penetrant inspections of the CCA forward flange on specified GE CF34-8 engines and requires replacement of the CCA if inspection reveals any indications of damage. The AD also clarifies inspection procedures, allows multiple FPIs before reaching the 25,000 part cycles since new threshold, and revises the definition of an engine shop visit. It establishes compliance deadlines and cost estimates for operators.
Why it matters
This AD is critical for aviation professionals as it addresses a safety risk related to the structural integrity of the combustion chamber assembly in widely used GE CF34-8 engines. Operators and maintenance organizations must comply to prevent potential engine failures caused by reduced cyclic life of the CCA forward flange. Timely inspections and replacements will help maintain engine reliability and regulatory compliance, avoiding unscheduled downtime and ensuring passenger safety.
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