# Airworthiness Directives; International Aero Engines Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2019-06-13 · Effective 2019-06-28 · 84 FR 27511
## Document
- **Document number:** 2019-12360
- **Category:** airworthiness
- **Manufacturer:** International Aero
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 84 FR 27511
- **Publication date:** 2019-06-13
- **Effective date:** 2019-06-28
- **FAA docket:** Docket No. FAA-2019-0393
## Abstract

The FAA is adopting a new airworthiness directive (AD) 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. This AD requires 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. This AD was prompted by multiple reports of in-flight engine shutdowns (IFSDs) 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/2019/06/13/2019-12360/airworthiness-directives-international-aero-engines-turbofan-engines)
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