# Proposed AD 99-NM-353-AD: Airbus Model A319 and A321 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-05-08
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 30, 1999, 64 FR 73438
- Comments due: January 31, 2000
- Became: [AD 2000-05-08](https://openairdocs.org/ad/2000-05-08)
- Docket: 99-NM-353-AD
- FR document: 99-33948
- Official PDF: https://openairdocs.org/files/sha256/3f/65/3f65fe503b19215f8bac0bfbf3d9db8af3fc7289e8f8eaa76af88fd9ef45e827 (from https://www.govinfo.gov/content/pkg/FR-1999-12-30/pdf/99-33948.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/12/30/99-33948/airworthiness-directives-airbus-model-a319-and-a321-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-353-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Airbus Model A319 and A321 series airplanes. This proposal would require replacement of the actuator of the ram air turbine (RAT) with a new actuator. It would also require modification of the actuator wiring. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent failure of the RAT to deploy in an emergency situation, and consequent loss of electrical and hydraulic systems.

## Notices in this docket

- Dec 30, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-33948, comments due Jan 31, 2000 (https://www.federalregister.gov/documents/1999/12/30/99-33948/airworthiness-directives-airbus-model-a319-and-a321-series-airplanes)

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