# Proposed AD FAA-2006-24523: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-13-02
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 21, 2006, 71 FR 20593
- Comments due: May 22, 2006
- Became: [AD 2006-13-02](https://openairdocs.org/ad/2006-13-02)
- Docket: FAA-2006-24523 (https://www.regulations.gov/docket/FAA-2006-24523, where comments are filed)
- Project: 2006-NM-057-AD
- FR document: E6-5987
- Official PDF: https://openairdocs.org/files/sha256/3d/a0/3da046b477b760e31c423bcee4ffefaf2bbc2703f881c8783ef29ce4e29489cd (from https://www.govinfo.gov/content/pkg/FR-2006-04-21/pdf/E6-5987.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/04/21/E6-5987/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E2E102FDDF9D3F6A862571570057C8B6.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24523

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain EMBRAER Model ERJ 170 airplanes. This proposed AD would require inspecting for excess sealant applied to the attachment bolts of the negative pressure relief valve, and performing corrective actions if necessary. This proposed 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 proposing 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.

## Notices in this docket

- Apr 21, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-5987, comments due May 22, 2006 (https://www.federalregister.gov/documents/2006/04/21/E6-5987/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-airplanes)

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