# Proposed AD 98-NM-261-AD: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120RT and -120ER Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-19-28
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 14, 1998, 63 FR 55059
- Comments due: November 13, 1998
- Became: [AD 99-19-28](https://openairdocs.org/ad/99-19-28)
- Docket: 98-NM-261-AD
- FR document: 98-27461
- Official PDF: https://openairdocs.org/files/sha256/25/44/254439068e7bba20e44f96e16858ebdd7a98b7f12e79abac02a5fc6cb2081dfb (from https://www.govinfo.gov/content/pkg/FR-1998-10-14/pdf/98-27461.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/10/14/98-27461/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-120rt-and--120er
- Page: https://openairdocs.org/proposed/98-NM-261-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-120RT and -120ER series airplanes. This proposal would require repetitive visual inspections to detect discrepancies of the brake assemblies on the main landing gear (MLG), and replacement of the brake assemblies with new brake assemblies, if necessary. This proposal is prompted by reports of fatigue cracking or splitting of the brake stator disk at the cut-out slots. The actions specified by the proposed AD are intended to prevent failure of the brake assemblies of the MLG due to cracking or splitting of the stator disk, which could result in loss of brake effectiveness and could cause the airplane to leave the runway surface.

## Notices in this docket

- Oct 14, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-27461, comments due Nov 13, 1998 (https://www.federalregister.gov/documents/1998/10/14/98-27461/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-120rt-and--120er)

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