# Proposed AD 2002-NM-215-AD: McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and Model MD-88 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-15-13
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 5, 2003, 68 FR 67978
- Comments due: January 20, 2004
- Became: [AD 2004-15-13](https://openairdocs.org/ad/2004-15-13)
- Docket: 2002-NM-215-AD
- FR document: 03-30218
- Official PDF: https://openairdocs.org/files/sha256/3a/39/3a396a97970c5d29964f2bff8ddab5b9f8b5b643aa99262c200a7d79e5d83c30 (from https://www.govinfo.gov/content/pkg/FR-2003-12-05/pdf/03-30218.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/12/05/03-30218/airworthiness-directives-mcdonnell-douglas-model-dc-9-81-md-81-dc-9-82-md-82-dc-9-83-md-83-dc-9-87
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FD99F92BAF4CEB3886256DF3005968B8.0001
- Page: https://openairdocs.org/proposed/2002-NM-215-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and Model MD-88 airplanes. This proposal would require replacement of certain freeze protection ribbon heaters in the lavatory water supply system, and flushing, cleaning, and sterilizing the potable water system; disconnecting, coiling, and stowing the wiring of the freeze protection ribbon heater; or removal of freeze protection heaters. This action is necessary to prevent failure of freeze protection ribbon heaters, which could result in the charring, scorching, smoking, and shorting out of freeze protection ribbon heaters in the lavatory water supply system. This condition, if not corrected, could also result in electrical arcing of freeze protection ribbon heaters, leading to fire and damage to water lines and components under the lavatory sink. This action is intended to addressthe identified unsafe condition.

## Notices in this docket

- Dec 5, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-30218, comments due Jan 20, 2004 (https://www.federalregister.gov/documents/2003/12/05/03-30218/airworthiness-directives-mcdonnell-douglas-model-dc-9-81-md-81-dc-9-82-md-82-dc-9-83-md-83-dc-9-87)

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