# Proposed AD FAA-2007-28349: Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-20-01
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 5, 2007, 72 FR 30999
- Comments due: July 20, 2007
- Became: [AD 2007-20-01](https://openairdocs.org/ad/2007-20-01)
- Docket: FAA-2007-28349 (https://www.regulations.gov/docket/FAA-2007-28349, where comments are filed)
- Project: 2007-NM-025-AD
- FR document: E7-10760
- Official PDF: https://openairdocs.org/files/sha256/29/64/29647853adadf929a1f894909563694342389a60ee6db5cd27ebc3797559c3c2 (from https://www.govinfo.gov/content/pkg/FR-2007-06-05/pdf/E7-10760.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/06/05/E7-10760/airworthiness-directives-boeing-model-747-100b-sud-747-200b-747-200c-747-200f-747-300-747-400
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/631D7967855C8739862572F1005A9FD4.0001
- Page: https://openairdocs.org/proposed/FAA-2007-28349

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP series airplanes. This proposed AD would require reconfiguring the clamps of certain wire bundles and applying insulating sealant to certain fasteners inside the fuel tanks. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent arcing inside the fuel tanks in the event of a lightning strike or high-powered short circuit, which could result in a fuel tank explosion or fire.

## Notices in this docket

- Jun 5, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-10760, comments due Jul 20, 2007 (https://www.federalregister.gov/documents/2007/06/05/E7-10760/airworthiness-directives-boeing-model-747-100b-sud-747-200b-747-200c-747-200f-747-300-747-400)

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