# Airworthiness Directives; Airbus Model A330-300 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 2005-10-04 · Effective 2005-10-19 · 70 FR 57732
## Document
- **Document number:** 05-19333
- **Category:** airworthiness
- **Manufacturer:** Airbus Model A330-300 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 70 FR 57732
- **Publication date:** 2005-10-04
- **Effective date:** 2005-10-19
- **FAA docket:** Docket No. FAA-2005-22539
## Abstract

The FAA adopts a new airworthiness directive (AD) for certain Airbus Model A330-300 series airplanes. This AD requires reinforcing the structure of the center fuselage by installing external stiffeners (butt straps) at frame (FR) 53.3 on the fuselage skin between left-hand and right-hand stringer 13, and related investigative actions. This AD results from a report that, during fatigue tests of the fuselage, cracks initiated and grew at the circumferential joint of FR53.3. We are issuing this AD to prevent fatigue cracking of the fuselage, which could result in reduced structural integrity of the fuselage.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/10/04/05-19333/airworthiness-directives-airbus-model-a330-300-series-airplanes)
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