# Proposed AD FAA-2009-0497: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes; and Model ERJ 190-100 LR, -100 IGW, -100 STD, -200 STD, -200 LR, and -200 IGW Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-18-04
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 2, 2009, 74 FR 26315
- Comments due: July 2, 2009
- Became: [AD 2010-18-04](https://openairdocs.org/ad/2010-18-04)
- Docket: FAA-2009-0497 (https://www.regulations.gov/docket/FAA-2009-0497, where comments are filed)
- Project: 2009-NM-019-AD
- FR document: E9-12802
- Official PDF: https://openairdocs.org/files/sha256/23/f4/23f4dc1912c8bdac5d1c3b512367f613216a71d6fd54bec15a6d5df382db0132 (from https://www.govinfo.gov/content/pkg/FR-2009-06-02/pdf/E9-12802.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/06/02/E9-12802/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-airplanes-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E0C839A106FB605A862575C9005A777A.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0497

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

It has been found the possibility of cracks developing in the ram air turbine (RAT) machined support, located in the forward compartment [zone 124] of [the] aircraft, due to downlock pin not [being] pull[ed] during its retraction. In case of RAT failure or malfunction, it will not provide electrical power to essential systems of [the] aircraft in [an] electrical emergency situation. * * * * *

Lack of electrical power could result in reduced controllability of the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Jun 2, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-12802, comments due Jul 2, 2009 (https://www.federalregister.gov/documents/2009/06/02/E9-12802/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-airplanes-and)

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