# Proposed AD FAA-2011-1229: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-18-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 14, 2011, 76 FR 70377
- Comments due: December 29, 2011
- Became: [AD 2012-18-05](https://openairdocs.org/ad/2012-18-05)
- Docket: FAA-2011-1229 (https://www.regulations.gov/docket/FAA-2011-1229, where comments are filed)
- Project: 2011-NM-132-AD
- FR document: 2011-29303
- Official PDF: https://openairdocs.org/files/sha256/6a/48/6a48e26e70d0b2b255f8f7a750681a21366e6a412afe8e8f9c0b8df6b2d890d0 (from https://www.govinfo.gov/content/pkg/FR-2011-11-14/pdf/2011-29303.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/11/14/2011-29303/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0017CC94669AAAFB86257948004FECA5.0001
- Page: https://openairdocs.org/proposed/FAA-2011-1229

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 series airplanes; and Model DC-9-81 (MD-81), DC-9-82 (MD- 82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88, and MD-90-30 airplanes, that are equipped with auxiliary fuel tanks. This proposed AD was prompted by fuel system reviews conducted by the manufacturer. This proposed AD would require adding design features to detect electrical faults, to detect a pump running in an empty fuel tank, and to ensure that a fuel pump's operation is not affected by certain conditions. We are proposing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

## Notices in this docket

- Nov 14, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-29303, comments due Dec 29, 2011 (https://www.federalregister.gov/documents/2011/11/14/2011-29303/airworthiness-directives-the-boeing-company-airplanes)

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