# Proposed AD FAA-2004-19867: McDonnell Douglas Model MD-90-30 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-13-14
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 16, 2004, 69 FR 75277
- Comments due: January 31, 2005
- Became: [AD 2005-13-14](https://openairdocs.org/ad/2005-13-14)
- Docket: FAA-2004-19867 (https://www.regulations.gov/docket/FAA-2004-19867, where comments are filed)
- Project: 2004-NM-58-AD
- FR document: 04-27512
- Official PDF: https://openairdocs.org/files/sha256/65/49/6549fe843aa4db829251da9802fa429b243c0e24aca840f0aebff0c082baf268 (from https://www.govinfo.gov/content/pkg/FR-2004-12-16/pdf/04-27512.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/12/16/04-27512/airworthiness-directives-mcdonnell-douglas-model-md-90-30-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B563C5B244CA85DF86256F6C005CF3C4.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19867

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all McDonnell Douglas Model MD-90-30 airplanes. This proposed AD would require replacing existing dual anti-skid control manifolds (DACM) with new, improved or reworked and reidentified DACMs; inspecting the inlet filters and other components of the DACMs for damage; replacing any damaged DACM components with new or serviceable components; and flushing/cleaning the braking system prior to replacing the inlet filters. This proposed AD is prompted by reports of multiple incidents of blown tires on landing while using maximum autobrake. We are proposing this AD to prevent metallic fibers from the first stage filter of the servo valves inside the DACM from becoming lodged in the first stage nozzle of the servo valve, which could lead to tire failure during high speed/high energy braking and possible subsequent runway departure.

## Notices in this docket

- Dec 16, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-27512, comments due Jan 31, 2005 (https://www.federalregister.gov/documents/2004/12/16/04-27512/airworthiness-directives-mcdonnell-douglas-model-md-90-30-airplanes)

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