# Proposed AD 94-NM-135-AD: British Aerospace Model Viscount 744, 745D, and 810 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 95-22-08
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 9, 1995, 60 FR 24587
- Comments due: June 20, 1995
- Became: [AD 95-22-08](https://openairdocs.org/ad/95-22-08)
- Docket: 94-NM-135-AD
- FR document: 95-11357
- Official PDF: https://openairdocs.org/files/sha256/33/36/33365ee325d49e8e8415d02238bb7234a1950bc4b452ba9a03c33771f4117459 (from https://www.govinfo.gov/content/pkg/FR-1995-05-09/pdf/95-11357.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/05/09/95-11357/airworthiness-directives-british-aerospace-model-viscount-744-745d-and-810-airplanes
- Page: https://openairdocs.org/proposed/94-NM-135-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain British Aerospace Model Viscount 744, 745D, and 810 airplanes, that currently establishes time-in-service limits for components of the fuselage pressure vessel, and requires modifications and inspections of various fuselage components to assure the continued structural integrity of these airplanes through the manufacturer's design life goal. This action would require additional modifications and inspections of the fuselage pressure vessel to extend the fuselage pressure vessel life from 30 to 45 years since new. This proposal is prompted by results of a review of fatigue test findings, stress analysis, and in-service history associated with pressure vessel components. The actions specified by the proposed AD are intended to prevent reduced structural capability of the fuselage pressure vessel.

## Notices in this docket

- May 9, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-11357, comments due Jun 20, 1995 (https://www.federalregister.gov/documents/1995/05/09/95-11357/airworthiness-directives-british-aerospace-model-viscount-744-745d-and-810-airplanes)

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