# Airworthiness Directives; International Aero Engines AG Turbofan Engines
> **Rule** · Final rule. · Published 2016-09-02 · Effective 2016-10-07 · 81 FR 60582
## Document
- **Document number:** 2016-21061
- **Category:** airworthiness
- **Manufacturer:** International Aero
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 60582
- **Publication date:** 2016-09-02
- **Effective date:** 2016-10-07
- **FAA docket:** Docket No. FAA-2016-4123
## Abstract

We are adopting a new airworthiness directive (AD) for certain International Aero Engines AG (IAE) V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 turbofan engines. This AD was prompted by the fracture of the high- pressure turbine (HPT) stage 2 hub during flight, which resulted in an in-flight shutdown (IFSD), undercowl fire, and smoke in the cabin. This AD requires inspecting the HPT stage 1 hub and HPT stage 2 hub, and, if necessary, their replacement with parts that are eligible for installation. We are issuing this AD to prevent failure of the HPT stage 1 or HPT stage 2 hubs, which could result in uncontained HPT blade release, damage to the engine, and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/09/02/2016-21061/airworthiness-directives-international-aero-engines-ag-turbofan-engines)
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