# Proposed AD FAA-2017-1116: Honeywell International Inc. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-21-01
- Products: Honeywell International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 30, 2018, 83 FR 4167
- Comments due: March 16, 2018
- Became: [AD 2018-21-01](https://openairdocs.org/ad/2018-21-01)
- Docket: FAA-2017-1116 (https://www.regulations.gov/docket/FAA-2017-1116, where comments are filed)
- FR document: 2018-01704
- Official PDF: https://openairdocs.org/files/sha256/c6/f0/c6f03b635d6f239745cd9f70dc903ffd3c1e1817c6dea1e08e43c93943753a87 (from https://www.govinfo.gov/content/pkg/FR-2018-01-30/pdf/2018-01704.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/01/30/2018-01704/airworthiness-directives-honeywell-international-inc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/57016906812F6FBF862582250071602D.0001
- Page: https://openairdocs.org/proposed/FAA-2017-1116

## Summary

We propose to supersede Airworthiness Directive (AD) 2017-20- 06, which applies to certain Honeywell International Inc. (Honeywell) AS907-1-1A turbofan engines. AD 2017-20-06 requires a one-time inspection of the second stage low-pressure turbine (LPT2) blades and, if the blades fail the inspection, the replacement of the blades with a part eligible for installation. Since we issued AD 2017-20-06, we determined the need to clarify the Applicability and Compliance sections of AD 2017-20-06. This proposed AD would continue to require a one-time inspection of the LPT2 blades and, if the blades fail the inspection, the replacement of the blades with a part eligible for installation. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jan 30, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-01704, comments due Mar 16, 2018 (https://www.federalregister.gov/documents/2018/01/30/2018-01704/airworthiness-directives-honeywell-international-inc-turbofan-engines)

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