# Proposed AD 98-NM-166-AD: McDonnell Douglas Model DC-9-80 Series Airplanes, and Model MD-88 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-07-14
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 26, 1998, 63 FR 34832
- Comments due: August 10, 1998
- Became: [AD 99-07-14](https://openairdocs.org/ad/99-07-14)
- Docket: 98-NM-166-AD
- FR document: 98-17007
- Official PDF: https://openairdocs.org/files/sha256/28/a0/28a0ed172f71db60b63022482beefc576de7682faa96e6acf2eb206ed2998ecd (from https://www.govinfo.gov/content/pkg/FR-1998-06-26/pdf/98-17007.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/06/26/98-17007/airworthiness-directives-mcdonnell-douglas-model-dc-9-80-series-airplanes-and-model-md-88-airplanes
- Page: https://openairdocs.org/proposed/98-NM-166-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 a one-time inspection to detect corrosion of the lug bores and the surface of the hinge plates of the vertical-to-horizontal stabilizer; and corrective actions, if necessary. This proposal is prompted by reports of corrosion of the lug bores and the surface of the hinge plates of the vertical-to-horizontal stabilizer, apparently due to the improper brushing of cadmium on the hinge plates during manufacture. The actions specified by the proposed AD are intended to detect and correct corrosion of the lug bores and the surface of the hinge plates of the vertical-to-horizontal stabilizer, which could result in reduced structural integrity of the airplane.

## Notices in this docket

- Jun 26, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-17007, comments due Aug 10, 1998 (https://www.federalregister.gov/documents/1998/06/26/98-17007/airworthiness-directives-mcdonnell-douglas-model-dc-9-80-series-airplanes-and-model-md-88-airplanes)

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