# Proposed AD 94-NM-167-AD: Mitsubishi Model YS-11 and -11A Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 95-14-05
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 19, 1995, 60 FR 19545
- Comments due: May 25, 1995
- Became: [AD 95-14-05](https://openairdocs.org/ad/95-14-05)
- Docket: 94-NM-167-AD
- FR document: 95-9352
- Official PDF: https://openairdocs.org/files/sha256/3f/76/3f7649cf4491fde1934ddcdda13e483ca5812e233b2f35c21b446758e97c2eda (from https://www.govinfo.gov/content/pkg/FR-1995-04-19/pdf/95-9352.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/04/19/95-9352/airworthiness-directives-mitsubishi-model-ys-11-and--11a-series-airplanes
- Page: https://openairdocs.org/proposed/94-NM-167-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Mitsubishi Model YS-11 and -11A series airplanes. This proposal would require the implementation of a corrosion prevention and control program. This proposal is prompted by incidents involving corrosion and fatigue cracking in transport category airplanes that are approaching or have exceeded their economic design goal; these incidents have jeopardized the airworthiness of the affected airplanes. The actions specified by the proposed AD are intended to prevent degradation of the structural capabilities of the affected airplanes due to problems associated with corrosion.

## Notices in this docket

- Apr 19, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-9352, comments due May 25, 1995 (https://www.federalregister.gov/documents/1995/04/19/95-9352/airworthiness-directives-mitsubishi-model-ys-11-and--11a-series-airplanes)

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