# Proposed AD FAA-2008-0736: McDonnell Douglas Model DC-9-14, DC-9- 15, and DC-9-15F Airplanes, and DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-03-03
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 1, 2008, 73 FR 44937
- Comments due: September 15, 2008
- Became: [AD 2009-03-03](https://openairdocs.org/ad/2009-03-03)
- Docket: FAA-2008-0736 (https://www.regulations.gov/docket/FAA-2008-0736, where comments are filed)
- Project: 2008-NM-102-AD
- FR document: E8-17620
- Official PDF: https://openairdocs.org/files/sha256/3a/81/3a81a45e13ba297f7cc5b4eba04c187e3b5ef5b84dd30e029ef588bdd8651e22 (from https://www.govinfo.gov/content/pkg/FR-2008-08-01/pdf/E8-17620.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/08/01/E8-17620/airworthiness-directives-mcdonnell-douglas-model-dc-9-14-dc-9-15-and-dc-9-15f-airplanes-and-dc-9-20
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C62B9E5510AF647086257498004B0846.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0736

## Summary

We propose to adopt a new airworthiness directive (AD) for certain McDonnell Douglas airplanes listed above. This proposed AD would require installing a dam assembly for the container of the fuel boost pump of the center tank located in the right main tank, and doing the related investigative actions, and corrective actions if necessary. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent the center tank fuel boost pump from operating in a fuel vapor zone and becoming a potential ignition source in the right main tank, potentially resulting in a fuel tank explosion and consequent loss of the airplane.

## Notices in this docket

- Aug 1, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-17620, comments due Sep 15, 2008 (https://www.federalregister.gov/documents/2008/08/01/E8-17620/airworthiness-directives-mcdonnell-douglas-model-dc-9-14-dc-9-15-and-dc-9-15f-airplanes-and-dc-9-20)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.