# Airworthiness Directives; International Aero Engines (IAE) Turbofan Engines
> **Rule** · Final rule. · Published 2018-11-07 · Effective 2018-12-12 · 83 FR 55614
## Document
- **Document number:** 2018-24239
- **Category:** airworthiness
- **Manufacturer:** International Aero
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 55614
- **Publication date:** 2018-11-07
- **Effective date:** 2018-12-12
- **FAA docket:** Docket No. FAA-2018-0404
## Abstract

We are adopting a new airworthiness directive (AD) for all International Aero Engines (IAE) PW1133G-JM, PW1133GA-JM, PW1130G-JM, PW1127G-JM, PW1127GA-JM, PW1127G1-JM, PW1124G-JM, PW1124G1-JM, and PW1122G-JM turbofan engines. This AD was prompted by reports of in- flight engine shutdowns and aborted take-offs as the result of certain parts affecting the durability of the rear high-pressure compressor (HPC) rotor hub knife edge seal. This AD requires replacing the diffuser case air seal assembly, the high-pressure turbine (HPT) 2nd- stage vane assembly, and the HPT 2nd-stage borescope stator vane assembly with parts eligible for installation. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/11/07/2018-24239/airworthiness-directives-international-aero-engines-iae-turbofan-engines)
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