# Airworthiness Directives; Boeing Model 777 Series Airplanes
> **Rule** · Final rule. · Published 2004-09-02 · Effective 2004-10-07 · 69 FR 53607
## Document
- **Document number:** 04-19856
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 777 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 53607
- **Publication date:** 2004-09-02
- **Effective date:** 2004-10-07
- **FAA docket:** Docket No. 2002-NM-350-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777 series airplanes. This action requires an inspection to determine the part number of the filter/ regulator on the fire extinguishing system installed in the lower cargo compartment of the airplane, and re-identification of the filter/ regulator, or replacement of the filter/regulator with a new filter/ regulator, if necessary. This action is necessary to prevent leakage of fire extinguishing agent through the filter/regulator of the cargo fire extinguishing system, which could result in the inability of the fire extinguishing system to suppress a fire in the cargo compartment of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/09/02/04-19856/airworthiness-directives-boeing-model-777-series-airplanes)
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