# Proposed AD 98-NM-34-AD: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-11-09
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 27, 1998, 63 FR 14853
- Comments due: April 27, 1998
- Became: [AD 98-11-09](https://openairdocs.org/ad/98-11-09)
- Docket: 98-NM-34-AD
- FR document: 98-8098
- Official PDF: https://openairdocs.org/files/sha256/cc/53/cc5384140e872052242053f4fb858f26203354a83bb818f25a333d229cc0456a (from https://www.govinfo.gov/content/pkg/FR-1998-03-27/pdf/98-8098.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/03/27/98-8098/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-34-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 series airplanes. This proposal would require a one-time visual inspection of the pilot valve harness tubes for bulges and cracks, cleaning the tubes, applying sealant at the tube end opening, and replacing any discrepant tubes with serviceable tubes. This proposal also would require replacement of the pilot valve harness tubes and vent valve tubes with new tubes having improved anti-corrosion protection. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent cracking of the pilot valve harness tubes, which could allow fuel to enter the conduit and leak overboard; this condition could result in increased risk of a fuel tank explosion and fire.

## Notices in this docket

- Mar 27, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-8098, comments due Apr 27, 1998 (https://www.federalregister.gov/documents/1998/03/27/98-8098/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes)

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