# Proposed AD FAA-2021-0699: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-05-08
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 24, 2021, 86 FR 47264
- Comments due: October 8, 2021
- Became: [AD 2022-05-08](https://openairdocs.org/ad/2022-05-08)
- Docket: FAA-2021-0699 (https://www.regulations.gov/docket/FAA-2021-0699, where comments are filed)
- Project: AD-2020-01685-E
- FR document: 2021-18148
- Official PDF: https://openairdocs.org/files/sha256/d9/de/d9de1f80e4f101ab3e40519ced0446268bb0c464409494b19b5c179810d50aa6 (from https://www.govinfo.gov/content/pkg/FR-2021-08-24/pdf/2021-18148.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/08/24/2021-18148/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E04BBE3F6C161FC68625873C004C4900.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0699

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) CF34-10E model turbofan engines. This proposed AD was prompted by a manufacturer investigation that revealed Teflon material in the A-sump oil strainer (strainer assembly) screen after several reports of in-flight shutdowns (IFSDs) and unscheduled engine removals (UERs). This proposed AD would require initial and repetitive visual inspections of the strainer assembly screen. As a terminating action to the initial and repetitive visual inspections, this proposed AD would require the replacement of the stationary oil seal at the No. 1 forward bearing. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 24, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-18148, comments due Oct 8, 2021 (https://www.federalregister.gov/documents/2021/08/24/2021-18148/airworthiness-directives-general-electric-company-turbofan-engines)

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