Superseded by FAA AD 2019-02-04

Published: Nov 12, 2018
Effective: Nov 23, 2018
Deadline: Nov 23, 2018

Engine Alliance GP7200

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

What to do

Operators must identify if their engines have the affected HPT stator cases by checking serial numbers listed in the referenced Engine Alliance service bulletins. They must remove and replace these parts within the specified cycle limits after the effective date of November 23, 2018. Replacement parts must be eligible for installation before further flight to maintain compliance.

Summary

FAA Airworthiness Directive 2018-22-05 is a final rule addressing Engine Alliance GP7270, GP7272, and GP7277 turbofan engines equipped with certain high-pressure turbine (HPT) stator cases. This directive mandates the removal and replacement of affected HPT cases due to unapproved weld repairs discovered at a manufacturing facility, which compromise the structural integrity of these components.

What changed

This new airworthiness directive requires operators to remove the identified HPT stator cases from service within specified cycle limits and replace them with parts eligible for installation. It introduces mandatory compliance times based on the number of part cycles since new or overhaul to mitigate the risk of HPT case failure.

Why it matters

This directive is critical for aviation professionals because the affected HPT cases have reduced material capability from unapproved welds, posing a risk of engine failure, fire, and potential damage to the aircraft. Compliance ensures continued airworthiness and safety of the affected Engine Alliance turbofan engines, protecting operators from in-service failures and regulatory penalties.

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