# Proposed AD 99-NM-171-AD: McDonnell Douglas Model MD-11 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-03-13
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 27, 1999, 64 FR 57814
- Comments due: December 13, 1999
- Became: [AD 2000-03-13](https://openairdocs.org/ad/2000-03-13)
- Docket: 99-NM-171-AD
- FR document: 99-27942
- Official PDF: https://openairdocs.org/files/sha256/ca/b3/cab31ee7540e957e2e0eade71bd8dc69d2549a19d6cd28b724230591f356ce74 (from https://www.govinfo.gov/content/pkg/FR-1999-10-27/pdf/99-27942.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/10/27/99-27942/airworthiness-directives-mcdonnell-douglas-model-md-11-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-171-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model MD-11 series airplanes. This proposal would require a one-time detailed visual inspection of the wire bundle installation behind the first observer's station to detect damaged or chafed wires; and corrective action, if necessary. This proposal is prompted by a report indicating that the wire bundle contained in the feedthrough behind the first observer's station was contacting the bottom portion of the feedthrough. The actions specified by the proposed AD are intended to prevent such contact, which could cause cable chafing, electrical arcing, smoke, or fire in the cockpit.

## Notices in this docket

- Oct 27, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-27942, comments due Dec 13, 1999 (https://www.federalregister.gov/documents/1999/10/27/99-27942/airworthiness-directives-mcdonnell-douglas-model-md-11-series-airplanes)

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