# Proposed AD FAA-2009-0213: McDonnell Douglas Model MD-90-30 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-11-11
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 10, 2009, 74 FR 10202
- Comments due: April 24, 2009
- Became: [AD 2009-11-11](https://openairdocs.org/ad/2009-11-11)
- Docket: FAA-2009-0213 (https://www.regulations.gov/docket/FAA-2009-0213, where comments are filed)
- Project: 2008-NM-224-AD
- FR document: E9-5014
- Official PDF: https://openairdocs.org/files/sha256/fe/6e/fe6e91f83377780d04af8cb3530d555149567ce34d4bc54385888c52c81d8a15 (from https://www.govinfo.gov/content/pkg/FR-2009-03-10/pdf/E9-5014.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/03/10/E9-5014/airworthiness-directives-mcdonnell-douglas-model-md-90-30-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3BAA7509142BFBFF86257575005DB129.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0213

## Summary

We propose to adopt a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-90-30 airplanes. This proposed AD would require installing fuses and wire protection in certain wing and fuel tank spars. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent possible damage to the fuel level float or pressure switch wires. Such damage could become a potential ignition source inside the fuel tank, and, combined with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.

## Notices in this docket

- Mar 10, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-5014, comments due Apr 24, 2009 (https://www.federalregister.gov/documents/2009/03/10/E9-5014/airworthiness-directives-mcdonnell-douglas-model-md-90-30-airplanes)

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