Airworthiness DirectiveEASA AD US-2024-14-04

Turbine Engine Compressor Section - Low-Pressure Compressor 1st-Stage Integrally Bladed Rotor - Replacement

Published: Aug 15, 2024
Effective: Aug 20, 2024
Deadline: Aug 20, 2024

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Affected operators must remove and replace the specified LPC key washers and LPC IBR-1 parts and install inlet guide vane spacers by the next engine shop visit or piece-part exposure after August 20, 2024. They should verify engine configuration against the affected part numbers and service bulletin incorporation status. Maintenance teams must follow the updated FAA AD instructions and coordinate with Pratt & Whitney service information to ensure compliance.

Summary

The Turbine Engine Compressor Section - Low-Pressure Compressor 1st-Stage Integrally Bladed Rotor - Replacement is a final rule airworthiness directive issued by the FAA affecting all International Aero Engines, LLC Model PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127G1A-JM, PW1127G1B-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines. It addresses an unsafe condition caused by fractures in the low-pressure compressor 1st-stage integrally bladed rotor (IBR-1) that led to an in-flight shutdown on an Airbus A320neo powered by these engines. The directive mandates removal and replacement of affected LPC key washers and IBR-1 parts and installation of inlet guide vane spacers to prevent recurrence.

What changed

This new airworthiness directive introduces mandatory removal and replacement of affected LPC key washers and LPC IBR-1 components, along with installation of redesigned inlet guide vane spacers. It also updates compliance requirements to include engines that have not incorporated certain Pratt & Whitney service bulletins, clarifying inspection and replacement timelines. The directive responds to a specific incident and incorporates feedback from industry stakeholders to refine compliance language.

Why it matters

This directive is critical for aviation professionals because it addresses a safety risk that can cause engine in-flight shutdowns, impacting flight safety and operational reliability. Operators and maintenance organizations must ensure affected engines are inspected and modified to prevent aerodynamic excitation failures. Compliance reduces the risk of unscheduled maintenance, potential flight disruptions, and enhances overall engine durability.

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