# Proposed AD FAA-2021-0129: International Aero Engines AG Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-11-15
- Products: International Aero Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 8, 2021, 86 FR 13225
- Comments due: April 7, 2021
- Became: [AD 2021-11-15](https://openairdocs.org/ad/2021-11-15)
- Docket: FAA-2021-0129 (https://www.regulations.gov/docket/FAA-2021-0129, where comments are filed)
- Project: AD-2020-01597-E
- FR document: 2021-04236
- Official PDF: https://openairdocs.org/files/sha256/b6/71/b671bcd8cd9dcec9fb7bc6ed28a7205ff95b1f5721f85225bcded539f4cc220a (from https://www.govinfo.gov/content/pkg/FR-2021-03-08/pdf/2021-04236.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/03/08/2021-04236/airworthiness-directives-international-aero-engines-ag-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5E3A898B88BA848286258692006D47CD.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0129

## Summary

The FAA proposes to adopt 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, V2531-E5, and V2533-A5 model turbofan engines. This proposed AD was prompted by an analysis performed by the manufacturer after an event involving an uncontained failure of a high-pressure turbine (HPT) 1st-stage disk that resulted in high-energy debris penetrating the engine cowling. This proposed AD would require the performance of an ultrasonic inspection (USI) of the HPT 1st-stage disk and HPT 2nd-stage disk and, depending on the results of the inspections, replacement of the HPT 1st-stage disk or HPT 2nd-stage disk. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 8, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-04236, comments due Apr 7, 2021 (https://www.federalregister.gov/documents/2021/03/08/2021-04236/airworthiness-directives-international-aero-engines-ag-turbofan-engines)

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