# Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER, -120FC, -120QC, and -120RT Airplanes
> **Rule** · Final rule. · Published 2006-05-26 · Effective 2006-06-30 · 71 FR 30281
## Document
- **Document number:** 06-4843
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 71 FR 30281
- **Publication date:** 2006-05-26
- **Effective date:** 2006-06-30
- **FAA docket:** Docket No. FAA-2006-24072
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER, -120FC, -120QC, and -120RT airplanes. This AD requires replacing the de-icing system ejector flow control valves with new, improved control valves having hermetically sealed switches; and rewiring applicable connectors. This AD results from a fuel system review conducted by the manufacturer. We are issuing this AD to prevent a potential source of ignition near a fuel tank, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/05/26/06-4843/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-120--120er--120fc)
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