# Proposed AD FAA-2005-21345: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-19-01
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 3, 2005, 70 FR 32544
- Comments due: July 5, 2005
- Became: [AD 2005-19-01](https://openairdocs.org/ad/2005-19-01)
- Docket: FAA-2005-21345 (https://www.regulations.gov/docket/FAA-2005-21345, where comments are filed)
- Project: 2005-NM-005-AD
- FR document: 05-11046
- Official PDF: https://openairdocs.org/files/sha256/73/7d/737dd35505eb71562c346cb65266a74f5525c57ad12a829ff4fe7122bf6da52f (from https://www.govinfo.gov/content/pkg/FR-2005-06-03/pdf/05-11046.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/06/03/05-11046/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4F26848988BDFBA686257015005C9C88.0001
- Page: https://openairdocs.org/proposed/FAA-2005-21345

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all EMBRAER Model ERJ 170 series airplanes. This proposed AD would require inspecting the hydraulic pressure tubes at the outlet of the engine-driven hydraulic pumps to determine the part and serial numbers; and replacing hydraulic pressure tubes having certain serial numbers with new hydraulic pressure tubes. This proposed AD is prompted by failure of a hydraulic system due to leakage of hydraulic fluid from a crack in the pipe coming from the pressure side of the engine driven pump. We are proposing this AD to prevent cracking of the hydraulic pressure pipes, which could result in failure of hydraulic system 1 or 2 or both, and consequent reduced controllability of the airplane.

## Notices in this docket

- Jun 3, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-11046, comments due Jul 5, 2005 (https://www.federalregister.gov/documents/2005/06/03/05-11046/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-erj-170-series-airplanes)

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