# Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes
> **Rule** · Final rule. · Published 2004-05-11 · Effective 2004-06-15 · 69 FR 26012
## Document
- **Document number:** 04-10251
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747-400 and 747-400D Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 26012
- **Publication date:** 2004-05-11
- **Effective date:** 2004-06-15
- **FAA docket:** Docket No. 2003-NM-93-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 and 747-400D series airplanes, that requires a detailed inspection of the fire extinguishing system tube and clamp for correct installation or a repetitive pressure test of the fire extinguishing system tube for leakage, and corrective action, if necessary. This action is necessary to prevent a chafed hole in the fire extinguishing system tube of the aft cargo compartment, which could result in a lack of fire extinguishing agent and consequent uncontained fire in the aft cargo compartment. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/05/11/04-10251/airworthiness-directives-boeing-model-747-400-and-747-400d-series-airplanes)
---
*AI Analytics · CC0 1.0*