# Proposed AD 99-NM-254-AD: Airbus Model A319, A320, and A321 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-02-36
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 21, 1999, 64 FR 56715
- Comments due: November 22, 1999
- Became: [AD 2000-02-36](https://openairdocs.org/ad/2000-02-36)
- Docket: 99-NM-254-AD
- FR document: 99-27566
- Official PDF: https://openairdocs.org/files/sha256/cf/e0/cfe076c5038e5933b47dac8b73c3066e29ae698a97c861629b7a2824d0b5e144 (from https://www.govinfo.gov/content/pkg/FR-1999-10-21/pdf/99-27566.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/10/21/99-27566/airworthiness-directives-airbus-model-a319-a320-and-a321-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-254-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Airbus Model A319, A320, and A321 series airplanes, that currently requires relocation of the engine/master 1 relay from relay box 103VU to shelf 95VU in the avionics bay. This action would continue to require the relocation using new electrical contacts, and, for certain airplanes, would add a requirement to replace certain contacts installed in shelf 95VU during relocation of the relay with new contacts. 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 a simultaneous cutoff of the fuel supply to both engines, which could result in a loss of engine power and consequent reduced controllability of the airplane.

## Notices in this docket

- Oct 21, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-27566, comments due Nov 22, 1999 (https://www.federalregister.gov/documents/1999/10/21/99-27566/airworthiness-directives-airbus-model-a319-a320-and-a321-series-airplanes)

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