# Proposed AD FAA-2008-0934: McDonnell Douglas Model DC-9-30, DC-9- 40, and DC-9-50 Series Airplanes, Model DC-9-81 (MD-81), DC-9-82 (MD- 82), DC-9-83 (MD-83), and DC-9-87 (MD-87) Airplanes, and Model MD-88 and MD-90-30 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-25-04
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 29, 2008, 73 FR 50894
- Comments due: October 14, 2008
- Became: [AD 2010-25-04](https://openairdocs.org/ad/2010-25-04)
- Docket: FAA-2008-0934 (https://www.regulations.gov/docket/FAA-2008-0934, where comments are filed)
- Project: 2008-NM-113-AD
- FR document: E8-20082
- Official PDF: https://openairdocs.org/files/sha256/1e/2b/1e2bca5cc26c8e13ab74416bbf36f6a8cc1c06e30c0a86ae7955f8018a644e41 (from https://www.govinfo.gov/content/pkg/FR-2008-08-29/pdf/E8-20082.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/08/29/E8-20082/airworthiness-directives-mcdonnell-douglas-model-dc-9-30-dc-9-40-and-dc-9-50-series-airplanes-model
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E3B22AF6AF468C81862574B4004A0BC6.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0934

## Summary

We propose to adopt a new airworthiness directive (AD) for the McDonnell Douglas airplanes listed above. This proposed AD would require modifying the fuel boost pumps for the center wing, and forward or aft auxiliary fuel tanks. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent possible sources of ignition in a fuel tank caused by an electrical fault or uncommanded dry operation of the fuel boost pumps. An ignition source in the fuel tank could result in a fire or an explosion and consequent loss of the airplane.

## Notices in this docket

- Aug 29, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-20082, comments due Oct 14, 2008 (https://www.federalregister.gov/documents/2008/08/29/E8-20082/airworthiness-directives-mcdonnell-douglas-model-dc-9-30-dc-9-40-and-dc-9-50-series-airplanes-model)

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