# Airworthiness Directives; Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes
> **Rule** · Final rule. · Published 2001-06-18 · Effective 2001-07-23 · 66 FR 32729
## Document
- **Document number:** 01-15089
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 66 FR 32729
- **Publication date:** 2001-06-18
- **Effective date:** 2001-07-23
- **FAA docket:** Docket No. 2000-NM-273-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain CASA Model CN-235 series airplanes, that requires installation of fuselage skin reinforcements in the right and left zones of the fuselage between stations 11232 and 11740 and stringers P7 and P9. The actions specified by this AD are intended to prevent premature fatigue cracking of the fuselage, which could result in reduced structural integrity of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/06/18/01-15089/airworthiness-directives-construcciones-aeronauticas-sa-casa-model-cn-235-series-airplanes)
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