EASA AD US-2020-08-01: Engine - Fan Blades - Removal / Replacement

What to do

Operators of aircraft equipped with the affected GE CF34 engine models must identify fan blades listed by part and serial numbers in the referenced GE Service Bulletins and remove and replace them within 90 days from May 15, 2020. Maintenance teams should follow the procedures in GE Service Bulletins CF34-BJ S/B 72-0306 and CF34-AL S/B 72-0314 for compliance. Alternative methods of compliance may be requested from the FAA if necessary.

Summary

The Federal Aviation Administration (FAA) Airworthiness Directive 2020-08-01 is a final rule addressing certain General Electric Company CF34-1A, CF34-3A, CF34-3A1, CF34-3A2, CF34-3B, and CF34-3B1 turbofan engines. This directive requires the removal and replacement of specific fan blades identified by part and serial numbers due to an in-flight failure that caused an engine shutdown. The directive aims to ensure continued airworthiness and safety of affected engines.

What changed

FAA Airworthiness Directive 2020-08-01 introduces a new mandatory requirement for operators of affected GE CF34 turbofan engines to remove and replace certain fan blades within 90 days of the effective date. It incorporates by reference two GE Service Bulletins detailing the procedures for removal and replacement of the affected fan blades. This is a new regulation prompted by an identified unsafe condition rather than an amendment to an existing directive.

Why it matters

This directive is critical for aviation professionals because it addresses a safety risk involving fan blade failure that can lead to engine shutdown and potential loss of aircraft control. Operators and maintenance organizations must comply to prevent in-flight engine failures, ensuring regulatory compliance and maintaining aircraft operational safety. The directive also impacts maintenance planning and parts inventory management due to the required blade replacements.