# Proposed AD 96-NM-190-AD: Raytheon Model DH 125-1A, -3A, and - 400A Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-09-12
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 20, 1997, 62 FR 7731
- Comments due: March 31, 1997
- Became: [AD 97-09-12](https://openairdocs.org/ad/97-09-12)
- Docket: 96-NM-190-AD
- FR document: 97-4197
- Official PDF: https://openairdocs.org/files/sha256/89/96/8996d17a4d6ed8dc6ca9a47e0a56555d8927d515592a3417df04424e1b19989b (from https://www.govinfo.gov/content/pkg/FR-1997-02-20/pdf/97-4197.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/02/20/97-4197/airworthiness-directives-raytheon-model-dh-125-1a--3a-and---400a-series-airplanes
- Page: https://openairdocs.org/proposed/96-NM-190-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Raytheon Model DH 125-1A, -3A, and -400A series airplanes. This proposal would require a one-time inspection to detect scoring of the upper fuselage skin around the periphery of the cockpit canopy blister interface, and repair, if necessary. This proposal is prompted by reports indicating that scoring of the upper fuselage skin had been detected in that area. The actions specified by the proposed AD are intended to detect and correct scoring of the upper fuselage skin around the periphery of the cockpit canopy blister interface, which could result in reduced structural integrity of the fuselage, and consequent cabin depressurization.

## Notices in this docket

- Feb 20, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-4197, comments due Mar 31, 1997 (https://www.federalregister.gov/documents/1997/02/20/97-4197/airworthiness-directives-raytheon-model-dh-125-1a--3a-and---400a-series-airplanes)

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