# Airworthiness Directives; International Aero Engines AG (IAE) V2500-A1, V2527E-A5, V2530-A5, and V2528-D5 Turbofan Engines
> **Rule** · Final rule. · Published 2009-10-26 · Effective 2009-11-30 · 74 FR 54895
## Document
- **Document number:** E9-25644
- **Category:** airworthiness
- **Manufacturer:** International Aero
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 74 FR 54895
- **Publication date:** 2009-10-26
- **Effective date:** 2009-11-30
- **FAA docket:** Docket No. FAA-2009-0294
## Abstract

The FAA is adopting a new airworthiness directive (AD) for International Aero Engines AG (IAE) V2500-A1, V2527E-A5, V2530-A5, and V2528-D5 turbofan engines. This AD requires reducing the published life limit of certain high-pressure compressor (HPC) stage 9-12 disc assemblies. This AD also removes from service those HPC stage 9-12 disc assemblies using a drawdown schedule. This AD results from IAE updating the low-cycle-fatigue (LCF) life analysis for certain HPC stage 9-12 disc assemblies. We are issuing this AD to prevent an uncontained failure of the HPC stage 9-12 disc assembly, resulting in an in-flight engine shutdown and possible damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/10/26/E9-25644/airworthiness-directives-international-aero-engines-ag-iae-v2500-a1-v2527e-a5-v2530-a5-and-v2528-d5)
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