# Proposed AD 2003-NM-198-AD: McDonnell Douglas Model DC-9-10, -20, - 30, -40, and -50 Series Airplanes; Model DC-9-81 (MD-81), -82 (MD-82), -83 (MD-83), and -87 (MD-87) Airplanes; and Model MD-88 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-17-18
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: December 20, 2005, 70 FR 75430
- Comments due: January 17, 2006
- Became: [AD 2007-17-18](https://openairdocs.org/ad/2007-17-18)
- Docket: 2003-NM-198-AD
- FR document: 05-24246
- Official PDF: https://openairdocs.org/files/sha256/e2/eb/e2eb6a1612646f1deab2f388a8f0340d5222fb906f55834560b5fd5476b715e5 (from https://www.govinfo.gov/content/pkg/FR-2005-12-20/pdf/05-24246.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/12/20/05-24246/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-model
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7C212AC740613769862570DD006EC460.0001
- Page: https://openairdocs.org/proposed/2003-NM-198-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 series airplanes; Model DC-9-81 (MD-81), -82 (MD-82), -83 (MD-83), and -87 (MD-87) airplanes; and Model MD-88 airplanes. That proposed AD would have required repetitive inspections and functional tests of the static port heater assemblies, an inspection of the static port heaters and insulators, and corrective actions if necessary. This new action revises the proposed AD by adding repetitive inspections of the static port heaters and insulators and revising the functional test of the static port heater. The actions specified by this new proposed AD are intended to prevent an electrical short of the static port heater from sparking and igniting the insulation blanket adjacent to the static port heater, which could result in smoke and/or fire in the cabin area. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Mar 8, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-5072, comments due Apr 22, 2004 (https://www.federalregister.gov/documents/2004/03/08/04-5072/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-model)
- Dec 20, 2005: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 05-24246, comments due Jan 17, 2006 (https://www.federalregister.gov/documents/2005/12/20/05-24246/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-model)

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