# Proposed AD FAA-2018-0719: Honeywell International Inc. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-05-07
- Products: Honeywell International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 14, 2018, 83 FR 46664
- Comments due: October 29, 2018
- Became: [AD 2019-05-07](https://openairdocs.org/ad/2019-05-07)
- Docket: FAA-2018-0719 (https://www.regulations.gov/docket/FAA-2018-0719, where comments are filed)
- FR document: 2018-19798
- Official PDF: https://openairdocs.org/files/sha256/c1/47/c147eda51775aa11ed2f2c89780afa6446aa11949e01b3e50cefede8948e11a3 (from https://www.govinfo.gov/content/pkg/FR-2018-09-14/pdf/2018-19798.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/09/14/2018-19798/airworthiness-directives-honeywell-international-inc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8B9E20FBA62521E4862583080044C89F.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0719

## Summary

We propose to supersede Airworthiness Directive (AD) 2017-20- 01, which applies to certain Honeywell International Inc. (Honeywell) TFE731-20 and TFE731-40 turbofan engines. AD 2017-20-01 requires removing the affected fan disk and replacing it with a fan disk eligible for installation. Since we issued AD 2017-20-01, we determined that some turbofan engine models were omitted from the applicability of AD 2017-20-01. This proposed AD would add these turbofan engine models to the applicability, remove the Honeywell TFE731-20 turbofan engine from the applicability, and prohibit installation of affected fan disks. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 14, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-19798, comments due Oct 29, 2018 (https://www.federalregister.gov/documents/2018/09/14/2018-19798/airworthiness-directives-honeywell-international-inc-turbofan-engines)

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