# Proposed AD 99-NM-167-AD: McDonnell Douglas Model MD-11 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-24-03
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 31, 1999, 64 FR 47438
- Comments due: October 15, 1999
- Became: [AD 99-24-03](https://openairdocs.org/ad/99-24-03)
- Docket: 99-NM-167-AD
- FR document: 99-22530
- Official PDF: https://openairdocs.org/files/sha256/18/76/1876515a90c1c61ec9f4ac5b5a7345f717d1c33eb952b212129b5f7af72dfd9d (from https://www.govinfo.gov/content/pkg/FR-1999-08-31/pdf/99-22530.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/08/31/99-22530/airworthiness-directives-mcdonnell-douglas-model-md-11-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-167-AD

## Summary

This document proposes the supersedure of two existing airworthiness directives (AD), applicable to certain McDonnell Douglas Model MD-11 series airplanes, that currently require inspections in the lower center cargo compartment at frame 1681 to verify that a certain bracket and a certain open face nylon clamp were installed to a specific wire bundle support and to detect damage of the subject wire bundle; and corrective actions, if necessary. Those AD's were prompted by an incident in which the insulation blanket in the lower center cargo compartment was found to be burnt due to a missing wiring harness support bracket/clamp on a wire bundle. This action would require a similar inspection and corrective actions required by the existing AD's and would remove certain airplanes from the applicability of the existing AD's. This action also would add a requirement to install a wire assembly support bracket, clamp, and spacer, or revise the wire assembly support bracket and clamp installation; as applicable. The actions specified by the proposed AD are intended to prevent sparks, smoke, and possible fire in the lower center cargo compartment.

## Notices in this docket

- Aug 31, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-22530, comments due Oct 15, 1999 (https://www.federalregister.gov/documents/1999/08/31/99-22530/airworthiness-directives-mcdonnell-douglas-model-md-11-series-airplanes)

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