# Proposed AD FAA-2016-4123: International Aero Engines AG Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-18-10
- Products: International Aero Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 5, 2016, 81 FR 19516
- Comments due: June 6, 2016
- Became: [AD 2016-18-10](https://openairdocs.org/ad/2016-18-10)
- Docket: FAA-2016-4123 (https://www.regulations.gov/docket/FAA-2016-4123, where comments are filed)
- Project: 2016-NE-06-AD
- FR document: 2016-07579
- Official PDF: https://openairdocs.org/files/sha256/ef/30/ef30629f624b84864104e9deaffe2ccc74a5dc8289dea27491552ef5fec6b3aa (from https://www.govinfo.gov/content/pkg/FR-2016-04-05/pdf/2016-07579.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/04/05/2016-07579/airworthiness-directives-international-aero-engines-ag-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5F739EE725C1DB3586257F8C004EA50A.0001
- Page: https://openairdocs.org/proposed/FAA-2016-4123

## Summary

We propose 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, and V2533-A5 turbofan engines. This proposed 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 proposed AD would require 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 proposing 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.

## Notices in this docket

- Apr 5, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-07579, comments due Jun 6, 2016 (https://www.federalregister.gov/documents/2016/04/05/2016-07579/airworthiness-directives-international-aero-engines-ag-turbofan-engines)

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