# Proposed AD FAA-2021-0511: Williams International Co., L.L.C. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-13-15
- Products: Williams International
- Product type: Engine
- Action: Supplemental notice of proposed rulemaking (SNPRM).
- Published: April 14, 2022, 87 FR 22153
- Comments due: May 31, 2022
- Became: [AD 2022-13-15](https://openairdocs.org/ad/2022-13-15)
- Docket: FAA-2021-0511 (https://www.regulations.gov/docket/FAA-2021-0511, where comments are filed)
- Project: AD-2020-01229-E
- FR document: 2022-07822
- Official PDF: https://openairdocs.org/files/sha256/a3/12/a312b5553dcad32bc0666ccbea6be9159108d9c2779306d2fa81a642f5b701f1 (from https://www.govinfo.gov/content/pkg/FR-2022-04-14/pdf/2022-07822.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/04/14/2022-07822/airworthiness-directives-williams-international-co-llc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-07822-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0511

## Summary

The FAA is revising a notice of proposed rulemaking (NPRM) that applied to certain Williams International Co., L.L.C. (Williams) FJ44-2A, FJ44-2C, FJ44-3A, and FJ44-3A-24 model turbofan engines. This action revises the NPRM by expanding the applicability, updating the estimated costs information, updating the compliance time, and adding an installation prohibition. This action also revises the NPRM by updating the service information references. The FAA is proposing this airworthiness directive (AD) to address the unsafe condition on these products. Since these actions would impose an additional burden over those in the NPRM, the agency is requesting comments on this SNPRM.

## Notices in this docket

- Jun 25, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-13516, comments due Aug 9, 2021 (https://www.federalregister.gov/documents/2021/06/25/2021-13516/airworthiness-directives-williams-international-co-llc-turbofan-engines)
- Apr 14, 2022: Supplemental notice of proposed rulemaking (SNPRM)., FR document 2022-07822, comments due May 31, 2022 (https://www.federalregister.gov/documents/2022/04/14/2022-07822/airworthiness-directives-williams-international-co-llc-turbofan-engines)

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