# Airworthiness Directives; Airbus Model A300 B2 and B4 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 2001-10-29 · Effective 2001-11-13 · 66 FR 54416
## Document
- **Document number:** 01-26860
- **Category:** airworthiness
- **Manufacturer:** Airbus Model A300 B2 and B4 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 66 FR 54416
- **Publication date:** 2001-10-29
- **Effective date:** 2001-11-13
- **FAA docket:** Docket No. 2001-NM-300-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Airbus Model A300 B2 and B4 series airplanes. This action requires determining the part and amendment numbers of the variable lever arm (VLA) of the rudder control system to verify the parts were installed using the correct standard, and corrective actions, if necessary. This action is necessary to prevent failure of both spring boxes of the VLA due to corrosion damage, which could result in loss of rudder control and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/10/29/01-26860/airworthiness-directives-airbus-model-a300-b2-and-b4-series-airplanes)
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