Engine — High Pressure Turbine Case — Replacement

Published: Mar 31, 2021
Effective: Apr 14, 2021
Deadline: Apr 14, 2021

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

What to do

Affected operators must remove and replace the defective HPT cases before exceeding the specified cycles since new, ranging from 9,000 to 13,000 cycles depending on the serial number. From 14 April 2021, only serviceable HPT cases may be installed on engines. Maintenance teams should follow the instructions in the referenced CFM Service Bulletins for identification and replacement procedures.

Summary

EASA Airworthiness Directive 2021-0097 is an airworthiness directive addressing certain CFM International LEAP-1A engines installed on Airbus A319, A320, and A321 aircraft. It mandates the replacement of specific High Pressure Turbine (HPT) cases with identified defective port castings to prevent potential failure. The directive applies to multiple LEAP-1A engine variants and aims to ensure continued safe operation by removing affected parts from service.

What changed

EASA Airworthiness Directive 2021-0097 introduces a mandatory replacement requirement for affected HPT cases identified by specific serial numbers due to manufacturing defects. It prohibits the installation of these defective HPT cases on any engine from the effective date. This is a new directive and does not supersede any previous AD.

Why it matters

This directive is critical for aviation professionals because defective HPT cases can lead to engine failure and release of high-energy debris, posing serious safety risks. Operators and maintenance organizations must ensure compliance to avoid unplanned engine failures and maintain regulatory airworthiness. Compliance also prevents regulatory violations and potential grounding of aircraft.

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