# Airworthiness Directives; McDonnell Douglas Model MD-11 and MD- 11F Series Airplanes
> **Rule** · Final rule. · Published 1999-12-13 · Effective 2000-01-18 · 64 FR 69389
## Document
- **Document number:** 99-31813
- **Category:** airworthiness
- **Manufacturer:** McDonnell Douglas Model MD-11 and MD- 11F Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 64 FR 69389
- **Publication date:** 1999-12-13
- **Effective date:** 2000-01-18
- **FAA docket:** Docket No. 99-NM-71-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 and MD-11F series airplanes, that requires a one-time inspection to determine if metallic transitions are installed on wire harnesses of the tail tank fuel transfer pumps, and to determine if damaged wires are present; and repair, if necessary. This amendment also would require repetitive inspections of the repaired area; and a permanent modification of the wire harnesses if metallic transitions are not installed, which terminates the repetitive inspections. This amendment is prompted by a report of chafing and damage to a wire harness of a tail tank fuel transfer pump. The actions specified by this AD are intended to prevent wire chafing and damage, which could result in an inoperative fuel transfer pump and/or an increased risk of a fire or explosion from a fuel leak.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/12/13/99-31813/airworthiness-directives-mcdonnell-douglas-model-md-11-and-md--11f-series-airplanes)
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