# Proposed AD 99-NM-98-AD: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-12-11
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: June 5, 2000, 65 FR 35590
- Comments due: June 30, 2000
- Became: [AD 2003-12-11](https://openairdocs.org/ad/2003-12-11)
- Docket: 99-NM-98-AD
- FR document: 00-14019
- Official PDF: https://openairdocs.org/files/sha256/b5/a5/b5a582830e40ce51421c5b50ad65167d0948968de38589587df6a40d7bc77acb (from https://www.govinfo.gov/content/pkg/FR-2000-06-05/pdf/00-14019.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/06/05/00-14019/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-98-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain EMBRAER Model EMB-145 series airplanes, that would have required a one-time ultrasonic inspection of the maneuvering actuator piston rod of the main landing gear (MLG) to ensure adequate wall thickness of the piston rods; and replacement of any discrepant piston rod with a new piston rod. That proposal was prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. This new action revises the proposed rule by removing all references to Change No. 01 of the referenced service bulletin. The actions specified by this new proposed AD are intended to prevent failure of the maneuvering actuator piston rod of the MLG, which would impede retraction of the MLG and consequent reduced controllability of the airplane.

## Notices in this docket

- May 7, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-11470, comments due Jun 7, 1999 (https://www.federalregister.gov/documents/1999/05/07/99-11470/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes)
- Jun 5, 2000: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 00-14019, comments due Jun 30, 2000 (https://www.federalregister.gov/documents/2000/06/05/00-14019/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes)

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