# Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes and Model ERJ 190 Airplanes
> **Rule** · Final rule. · Published 2007-08-09 · Effective 2007-09-13 · 72 FR 44734
## Document
- **Document number:** E7-15412
- **Category:** airworthiness
- **Manufacturer:** Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 72 FR 44734
- **Publication date:** 2007-08-09
- **Effective date:** 2007-09-13
- **FAA docket:** Docket No. FAA-2007-28094
## Abstract

The FAA is superseding an existing airworthiness directive (AD), which applies to all EMBRAER Model ERJ 170-100 LR, -100 STD, -100 SE, and -100 SU airplanes. That AD currently requires repetitively replacing the low-stage check valve and associated seals of the right- hand engine bleed system. This new AD adds new airplanes to that existing requirement. For all airplanes, this AD also requires repetitively replacing the low-stage check valve and associated seals of the left-hand engine bleed system with a new check valve and new seals. This AD results from a report that an engine shut down during flight due to the failure of the low-stage check valve to close. We are issuing this AD to prevent failure of the low-stage check valve, which could result in an engine shutting down during flight.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/08/09/E7-15412/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-airplanes-and)
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