# Proposed AD 95-NM-159-AD: Jetstream Model 4101 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 96-13-10
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 19, 1996, 61 FR 1300
- Comments due: February 22, 1996
- Became: [AD 96-13-10](https://openairdocs.org/ad/96-13-10)
- Docket: 95-NM-159-AD
- FR document: 96-573
- Official PDF: https://openairdocs.org/files/sha256/14/16/14160a2ea72f650622942c5139b172ff4dc5848f75c56b02d3e71276f025aad6 (from https://www.govinfo.gov/content/pkg/FR-1996-01-19/pdf/96-573.pdf)
- Federal Register: https://www.federalregister.gov/documents/1996/01/19/96-573/airworthiness-directives-jetstream-model-4101-airplanes
- Page: https://openairdocs.org/proposed/95-NM-159-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Jetstream Model 4101 series airplanes. This proposal would require modification of the existing diaphragms on the surround structure of the Type II emergency exit. This proposal is prompted by a report that, during fatigue tests on a Model 4101 test article, cracking was found in the surround structure of a Type II emergency exit due to fatigue-related stress. The actions specified by the proposed AD are intended to prevent fatigue-related cracking in the surround structure of the Type II emergency exit, which could result in reduced structural integrity of the fuselage pressure vessel.

## Notices in this docket

- Jan 19, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-573, comments due Feb 22, 1996 (https://www.federalregister.gov/documents/1996/01/19/96-573/airworthiness-directives-jetstream-model-4101-airplanes)

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