# Airworthiness Directives; Boeing Model 747-400 and -400D Series Airplanes
> **Rule** · Final rule; request for comments. · Published 2004-04-06 · Effective 2004-04-21 · 69 FR 17919
## Document
- **Document number:** 04-7298
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747-400 and -400D Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 69 FR 17919
- **Publication date:** 2004-04-06
- **Effective date:** 2004-04-21
- **FAA docket:** Docket No. 2004-NM-01-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 and -400D series airplanes. This action requires an inspection to determine the routing configuration of wire bundle W4489 and related investigative/corrective actions. This action is necessary to prevent possible interference between wire bundle W4489 and the receptacle housing of the chiller boost fan, drain tubes, and adjacent structure, which could result in damage to the wire bundle and consequent arcing and fire. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/04/06/04-7298/airworthiness-directives-boeing-model-747-400-and--400d-series-airplanes)
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