# Proposed AD FAA-2013-0686: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-09-08
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 12, 2013, 78 FR 48835
- Comments due: September 26, 2013
- Became: [AD 2014-09-08](https://openairdocs.org/ad/2014-09-08)
- Docket: FAA-2013-0686 (https://www.regulations.gov/docket/FAA-2013-0686, where comments are filed)
- Project: 2013-NM-006-AD
- FR document: 2013-19462
- Official PDF: https://openairdocs.org/files/sha256/0f/2b/0f2b1649742ae5341ef4d8943fbf67ec29979d13510621d999e54170f44cb813 (from https://www.govinfo.gov/content/pkg/FR-2013-08-12/pdf/2013-19462.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/08/12/2013-19462/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/979C36B249D4405986257BC5004EDBC9.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0686

## Summary

We propose to supersede airworthiness directive (AD) 2007-16- 19, which applies to certain The Boeing Company Model 747-200B, 747- 300, and 747-400 series airplanes. AD 2007-16-19 requires repetitive detailed inspections for cracking of the aft tension tie channels from body station (BS) 1120 to BS 1220 and from BS 880 to BS 1100, and corrective actions if necessary, and optional terminating action. Since we issued that AD, analysis has indicated the need to mandate the previously optional modification. This proposed AD would retain the existing requirements, limit the area of the detailed inspection, add repetitive surface high-frequency eddy current inspections, and mandate the previously optional terminating action. We are proposing this AD to prevent fatigue cracking of the tension ties, which could result in reduced structural integrity of the airplane and rapid depressurization of the airplane.

## Notices in this docket

- Aug 12, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-19462, comments due Sep 26, 2013 (https://www.federalregister.gov/documents/2013/08/12/2013-19462/airworthiness-directives-the-boeing-company-airplanes)

---
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.