# Airworthiness Directives; International Aero Engines LLC Turbofan Engines
> **Rule** · Final rule. · Published 2020-03-17 · Effective 2020-04-21 · 85 FR 15054
## Document
- **Document number:** 2020-05330
- **Category:** airworthiness
- **Manufacturer:** International Aero
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 15054
- **Publication date:** 2020-03-17
- **Effective date:** 2020-04-21
- **FAA docket:** Docket No. FAA-2019-0614
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2019-11-08 for all International Aero Engines, LLC (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1129G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G- JM, PW1124G1-JM, and PW1122G-JM model turbofan engines. AD 2019-11-08 required the removal of the main gearbox (MGB) assembly and electronic engine control (EEC) software and the installation of a part and software version eligible for installation for engines that operate on extended operations (ETOPS) flights. This AD retains the requirements of AD 2019-11-08 and requires replacement of the MGB assembly and EEC software on engines that do not operate on ETOPS flights. This AD was prompted by multiple reports of in-flight engine shutdowns as the result of high-cycle fatigue causing fracture of certain parts of the MGB assembly. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/03/17/2020-05330/airworthiness-directives-international-aero-engines-llc-turbofan-engines)
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