# Proposed AD 97-NM-20-AD: McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-17-06
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 20, 1998, 63 FR 13579
- Comments due: May 4, 1998
- Became: [AD 98-17-06](https://openairdocs.org/ad/98-17-06)
- Docket: 97-NM-20-AD
- FR document: 98-7229
- Official PDF: https://openairdocs.org/files/sha256/0e/ce/0ece2e614327e180e6373bd8bd7b2defd404e10a6f02ffbc80e48a3ad28b89f1 (from https://www.govinfo.gov/content/pkg/FR-1998-03-20/pdf/98-7229.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/03/20/98-7229/airworthiness-directives-mcdonnell-douglas-model-dc-9-80-series-airplanes-and-model-md-88-airplanes
- Page: https://openairdocs.org/proposed/97-NM-20-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model DC-9-80 series airplanes and Model MD-88 airplanes. This proposal would require repetitive inspections to detect fatigue cracking of certain fuselage skin panels, and repair, if necessary. For certain airplanes, the proposed AD also provides for an optional preventative modification, which, if accomplished, would terminate the repetitive inspections. This proposal is prompted by reports of fatigue cracking of certain fuselage skin panels. The actions specified by the proposed AD are intended to prevent such fatigue cracking, which could result in reduced structural integrity of the airplane, and consequent loss of pressurization.

## Notices in this docket

- Mar 20, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-7229, comments due May 4, 1998 (https://www.federalregister.gov/documents/1998/03/20/98-7229/airworthiness-directives-mcdonnell-douglas-model-dc-9-80-series-airplanes-and-model-md-88-airplanes)

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