# Proposed AD FAA-2015-1658: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-23-04
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 17, 2015, 80 FR 34560
- Comments due: August 17, 2015
- Became: [AD 2015-23-04](https://openairdocs.org/ad/2015-23-04)
- Docket: FAA-2015-1658 (https://www.regulations.gov/docket/FAA-2015-1658, where comments are filed)
- Project: 2015-NE-18-AD
- FR document: 2015-14695
- Official PDF: https://openairdocs.org/files/sha256/65/fe/65feb69019ac1a535e7a0f80e20642f99d1c327c2c73b03e101b573056d66daa (from https://www.govinfo.gov/content/pkg/FR-2015-06-17/pdf/2015-14695.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/06/17/2015-14695/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B305EE2A9980B6DA86257E67004DBBC0.0001
- Page: https://openairdocs.org/proposed/FAA-2015-1658

## Summary

We propose to adopt a new airworthiness directive (AD) for all General Electric Company (GE) GEnx-1B turbofan engine models. This proposed AD was prompted by reports of GEnx-1B engine oil loss. This proposed AD would require removal and replacement of the non-conforming ball valve in the oil filler cap. We are proposing this AD to prevent loss of engine oil, which could lead to failure of one or more engines, loss of thrust control, and damage to the airplane.

## Notices in this docket

- Jun 17, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-14695, comments due Aug 17, 2015 (https://www.federalregister.gov/documents/2015/06/17/2015-14695/airworthiness-directives-general-electric-company-turbofan-engines)

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