# Proposed AD 2002-NM-341-AD: Boeing Model 747 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-09-10
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 29, 2003, 68 FR 22639
- Comments due: June 13, 2003
- Became: [AD 2004-09-10](https://openairdocs.org/ad/2004-09-10)
- Docket: 2002-NM-341-AD
- FR document: 03-10515
- Official PDF: https://openairdocs.org/files/sha256/c1/d7/c1d761f5c89f03e19e99dc09804850702354dcee3dea8bc13e64fdb32882f5f3 (from https://www.govinfo.gov/content/pkg/FR-2003-04-29/pdf/03-10515.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/04/29/03-10515/airworthiness-directives-boeing-model-747-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DAF42A756557611A86256D1700505F5E.0001
- Page: https://openairdocs.org/proposed/2002-NM-341-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 747 series airplanes. This proposal would require a one-time inspection of the potable water and drain lines in the forward and aft cargo compartments for indications of overheating of the heater tape, exposed foam insulation, missing or damaged protective tape, or debris around the potable water fill and drain lines; and corrective action, if necessary. This action is necessary to prevent overheating of the heater tape on potable water fill and drain lines, which may ignite accumulated debris or contaminants on or near the potable water fill and drain lines, resulting in a fire in the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Apr 29, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-10515, comments due Jun 13, 2003 (https://www.federalregister.gov/documents/2003/04/29/03-10515/airworthiness-directives-boeing-model-747-series-airplanes)

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