# Airworthiness Directives; International Aero Engines AG Turbofan Engines
> **Rule** · Final rule. · Published 2021-03-25 · Effective 2021-04-29 · 86 FR 15791
## Document
- **Document number:** 2021-06139
- **Category:** airworthiness
- **Manufacturer:** International Aero
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 15791
- **Publication date:** 2021-03-25
- **Effective date:** 2021-04-29
- **FAA docket:** Docket No. FAA-2020-0700
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2019-06-06 for all International Aero Engines AG (IAE) V2500-A1, V2522-A5, V2524- A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 model turbofan engines. AD 2019-06-06 required initial and repetitive borescope inspections (BSIs) of the M-flange and, if it fails the inspection, replacement of the diffuser case with a part eligible for installation. This AD requires an initial BSI of the M- flange and, if it fails the inspection, repetitive BSIs of the M-flange until replacement of the diffuser case M-flange. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/03/25/2021-06139/airworthiness-directives-international-aero-engines-ag-turbofan-engines)
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