# Proposed AD 2002-NM-350-AD: Boeing Model 777 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-17-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 22, 2003, 68 FR 71049
- Comments due: February 5, 2004
- Became: [AD 2004-17-05](https://openairdocs.org/ad/2004-17-05)
- Docket: 2002-NM-350-AD
- FR document: 03-31444
- Official PDF: https://openairdocs.org/files/sha256/af/5d/af5deb8e574e174a5c99314fb68dac9ec0e58b8caf49f1cb20a56a1d709dc31b (from https://www.govinfo.gov/content/pkg/FR-2003-12-22/pdf/03-31444.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/12/22/03-31444/airworthiness-directives-boeing-model-777-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3A3D9CF471D44B3B86256E04004F4A14.0001
- Page: https://openairdocs.org/proposed/2002-NM-350-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 777 series airplanes. This proposal would require 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 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.

## Notices in this docket

- Dec 22, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-31444, comments due Feb 5, 2004 (https://www.federalregister.gov/documents/2003/12/22/03-31444/airworthiness-directives-boeing-model-777-series-airplanes)

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