# Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes
> **Rule** · Final rule. · Published 2006-06-20 · Effective 2006-07-25 · 71 FR 35383
## Document
- **Document number:** 06-5500
- **Category:** airworthiness
- **Manufacturer:** Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 71 FR 35383
- **Publication date:** 2006-06-20
- **Effective date:** 2006-07-25
- **FAA docket:** Docket No. FAA-2006-24523
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain EMBRAER Model ERJ 170 airplanes. This AD requires inspecting for excess sealant applied to the attachment bolts of the negative pressure relief valve, and performing corrective actions if necessary. This AD results from reports that excess sealant was applied to the attachment bolts of the negative pressure relief valve, which interfered with the valve's movable diaphragm. We are issuing this AD to prevent incorrect operation of the negative pressure relief valve, which could result in negative pressures that exceed the structural strength limits of the airframe and lead to reduced structural integrity of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/06/20/06-5500/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-airplanes)
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