# Proposed AD FAA-2013-0210: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-03-07
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 14, 2013, 78 FR 16198
- Comments due: April 29, 2013
- Became: [AD 2014-03-07](https://openairdocs.org/ad/2014-03-07)
- Docket: FAA-2013-0210 (https://www.regulations.gov/docket/FAA-2013-0210, where comments are filed)
- Project: 2012-NM-053-AD
- FR document: 2013-05864
- Official PDF: https://openairdocs.org/files/sha256/91/57/9157e5f372d81a4ff7368fca61e02e9d896967cab825414c0411c6db6d5b7b27 (from https://www.govinfo.gov/content/pkg/FR-2013-03-14/pdf/2013-05864.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/03/14/2013-05864/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/439B036CF6CBF89286257B2E0049E746.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0210

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model MD-11 and MD-11F airplanes. The existing AD currently requires inspecting to determine if wires touch the upper surface of the center upper auxiliary fuel tank, and marking the location, as necessary; inspecting all wire bundles above the center upper auxiliary fuel tank for splices and damage; inspecting for damage to the fuel vapor barrier seal and upper surface of the center upper auxiliary fuel tank; and performing corrective actions, as necessary. The existing AD also requires installing nonmetallic barrier/shield sleeving, new clamps, new attaching hardware, and a new extruded channel. The existing AD resulted from fuel system reviews conducted by the manufacturer. Since we issued that AD, we have identified additional center upper auxiliary fuel tank locations where inspections and corrective actions are needed. 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

- Mar 14, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-05864, comments due Apr 29, 2013 (https://www.federalregister.gov/documents/2013/03/14/2013-05864/airworthiness-directives-the-boeing-company-airplanes)

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