# Proposed AD FAA-2011-0392: General Electric Company CT7-8, CT7-8A, CT7-8A1, CT7-8E, and CT7-8F5 Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-19-03
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 2, 2011, 76 FR 24407
- Comments due: June 16, 2011
- Became: [AD 2011-19-03](https://openairdocs.org/ad/2011-19-03)
- Docket: FAA-2011-0392 (https://www.regulations.gov/docket/FAA-2011-0392, where comments are filed)
- Project: 2011-NE-12-AD
- FR document: 2011-10522
- Official PDF: https://openairdocs.org/files/sha256/42/ec/42ec9f6be018504de318f17fee5b77e374c92229d926e712e9baeb4681a5e93c (from https://www.govinfo.gov/content/pkg/FR-2011-05-02/pdf/2011-10522.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/05/02/2011-10522/airworthiness-directives-general-electric-company-ct7-8-ct7-8a-ct7-8a1-ct7-8e-and-ct7-8f5-turboshaft
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/850DB2735D47A2FC86257884005593A9.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0392

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require the installation of an accessory gearbox (AGB) axis-A oil slinger nut to the axis-A shaft assembly. This proposed AD was prompted by four reports of unrecoverable engine stalls, during hover in a left-roll attitude. We are proposing this AD to prevent an unrecoverable engine stall, leading to a helicopter forced landing or accident.

## Notices in this docket

- May 2, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-10522, comments due Jun 16, 2011 (https://www.federalregister.gov/documents/2011/05/02/2011-10522/airworthiness-directives-general-electric-company-ct7-8-ct7-8a-ct7-8a1-ct7-8e-and-ct7-8f5-turboshaft)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.