# Proposed AD 2003-NM-79-AD: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-12-12
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 6, 2004, 69 FR 17984
- Comments due: May 6, 2004
- Became: [AD 2004-12-12](https://openairdocs.org/ad/2004-12-12)
- Docket: 2003-NM-79-AD
- FR document: 04-7713
- Official PDF: https://openairdocs.org/files/sha256/29/0f/290ffd1cb18ff9851482231263c00ac2e5c6be42f5fb7995aa2ca0a0e278d4d5 (from https://www.govinfo.gov/content/pkg/FR-2004-04-06/pdf/04-7713.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/04/06/04-7713/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-120-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C4D764BEDF5D572586256E6E005159E9.0001
- Page: https://openairdocs.org/proposed/2003-NM-79-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-120 series airplanes. This proposal would require repetitive inspections for cracks or evidence of damage/distortion of the anti-skid drive coupling clips for the hubcaps of the main landing gear (MLG) wheels; repetitive measurement of the gap and height dimensions of the coupling clips; corrective actions, if necessary; and eventual replacement of all coupling clips with new, improved coupling clips. This action is necessary to prevent excessive gaps in the anti-skid drive coupling clips for the hubcaps of the MLG, which could result in momentary loss of the normal braking system at low speeds, and reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Apr 6, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-7713, comments due May 6, 2004 (https://www.federalregister.gov/documents/2004/04/06/04-7713/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-120-series-airplanes)

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