# Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series Airplanes
> **Rule** · Final rule. · Published 2000-10-06 · Effective 2000-11-13 · 65 FR 59708
## Document
- **Document number:** 00-25150
- **Category:** airworthiness
- **Manufacturer:** Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 65 FR 59708
- **Publication date:** 2000-10-06
- **Effective date:** 2000-11-13
- **FAA docket:** Docket No. 99-NM-356-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain EMBRAER Model EMB-120 series airplanes, that requires revising the Airplane Flight Manual (AFM), and either installing hydraulic tube assemblies incorporating a check valve, or visually inspecting the check valve if already installed and corrective action, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent the landing gear doors from becoming blocked from opening during application of emergency procedures in the event of a loss of hydraulics.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/10/06/00-25150/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-120-series-airplanes)
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