# Proposed AD FAA-2014-0778: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-15-11
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 28, 2014, 79 FR 70799
- Comments due: January 12, 2015
- Became: [AD 2015-15-11](https://openairdocs.org/ad/2015-15-11)
- Docket: FAA-2014-0778 (https://www.regulations.gov/docket/FAA-2014-0778, where comments are filed)
- Project: 2014-NM-095-AD
- FR document: 2014-28124
- Official PDF: https://openairdocs.org/files/sha256/7b/7b/7b7b9f083cb56393ffd7d1b9a62c17f3c086e4f0473f2f6ef258a2c6741021e9 (from https://www.govinfo.gov/content/pkg/FR-2014-11-28/pdf/2014-28124.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/11/28/2014-28124/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EFD92E1EDC38D97386257D9E00504F8A.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0778

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-100B, 747-100B SUD, 747-200B, 747- 200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This proposed AD was prompted by reports of corrosion found on the mating surfaces between certain skin and stringers at circumferential skin splices. This proposed AD would require general visual inspections of the fuselage skin at certain lower circumferential splices for the presence of existing external doublers, repetitive inspections of the fuselage skin, and related investigative and corrective actions if necessary. We are proposing this AD to detect and correct compromised fillet seals, which can result in corrosion and skin cracking and consequent loss of capability to support limit loads.

## Notices in this docket

- Nov 28, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-28124, comments due Jan 12, 2015 (https://www.federalregister.gov/documents/2014/11/28/2014-28124/airworthiness-directives-the-boeing-company-airplanes)

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