# Proposed AD FAA-2006-24430: McDonnell Douglas Model DC-9-31, DC-9- 32, DC-9-32F, DC-9-33F, DC-9-34, and DC-9-34F Airplanes; and Model DC- 9-40 and DC-9-50 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-13-18
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 13, 2006, 71 FR 19140
- Comments due: May 30, 2006
- Became: [AD 2006-13-18](https://openairdocs.org/ad/2006-13-18)
- Docket: FAA-2006-24430 (https://www.regulations.gov/docket/FAA-2006-24430, where comments are filed)
- Project: 2006-NM-048-AD
- FR document: E6-5472
- Official PDF: https://openairdocs.org/files/sha256/29/99/2999cf29e021e8bd610234514f2e1c986e2eff43107cf300ed245c3114042691 (from https://www.govinfo.gov/content/pkg/FR-2006-04-13/pdf/E6-5472.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/04/13/E6-5472/airworthiness-directives-mcdonnell-douglas-model-dc-9-31-dc-9-32-dc-9-32f-dc-9-33f-dc-9-34-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9C0D1BE40947BDA08625714F0069322E.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24430

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain transport category airplanes, identified above. This proposed AD would require installing a bonding jumper from the boost pump volute to the fuel tank structure, and related investigative/ corrective actions. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent point-contact arcing or filament heating in the fuel tank, which, in the event of a short or ground fault inside the fuel tank, could result in a fuel tank explosion and consequent loss of the airplane.

## Notices in this docket

- Apr 13, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-5472, comments due May 30, 2006 (https://www.federalregister.gov/documents/2006/04/13/E6-5472/airworthiness-directives-mcdonnell-douglas-model-dc-9-31-dc-9-32-dc-9-32f-dc-9-33f-dc-9-34-and)

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