# Proposed AD 2000-NM-273-AD: Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-12-12
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 10, 2001, 66 FR 18573
- Comments due: May 10, 2001
- Became: [AD 2001-12-12](https://openairdocs.org/ad/2001-12-12)
- Docket: 2000-NM-273-AD
- FR document: 01-8726
- Official PDF: https://openairdocs.org/files/sha256/0b/e5/0be5b015a34971ee2981346ecb90fd3acbb8622b6cb4b414d32146fc355cf3bd (from https://www.govinfo.gov/content/pkg/FR-2001-04-10/pdf/01-8726.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/04/10/01-8726/airworthiness-directives-construcciones-aeronauticas-sa-casa-model-cn-235-series-airplanes
- Page: https://openairdocs.org/proposed/2000-NM-273-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain CASA Model CN-235 series airplanes. This proposal would require installation of fuselage skin reinforcements in the right and left zones of the fuselage between stations 11232 and 11740 and stringers P7 and P9. This action is necessary 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.

## Notices in this docket

- Apr 10, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-8726, comments due May 10, 2001 (https://www.federalregister.gov/documents/2001/04/10/01-8726/airworthiness-directives-construcciones-aeronauticas-sa-casa-model-cn-235-series-airplanes)

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