# Proposed AD FAA-2014-0009: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-13-11
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 10, 2014, 79 FR 7598
- Comments due: March 27, 2014
- Became: [AD 2014-13-11](https://openairdocs.org/ad/2014-13-11)
- Docket: FAA-2014-0009 (https://www.regulations.gov/docket/FAA-2014-0009, where comments are filed)
- Project: 2013-NM-123-AD
- FR document: 2014-02717
- Official PDF: https://openairdocs.org/files/sha256/27/c6/27c653aef505e7d0d7be198bef8c1cede40fd275038dc8fb4049f202916d63e1 (from https://www.govinfo.gov/content/pkg/FR-2014-02-10/pdf/2014-02717.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/02/10/2014-02717/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A2C2A70447A1BA7786257C7B004E845A.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0009

## Summary

We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 707 airplanes, and Model 720 and 720B series airplanes. This proposed AD was prompted by reports of scribe-line- related fatigue cracks on Model 727 airplanes, which are similar in design to Model 707 airplanes, and Model 720 and 720B series airplanes. This proposed AD would require inspections for scribe lines in the skin lap joints, external approved repairs, external features, skin butt joints, and decals, and related investigative and corrective actions if necessary. This proposed AD would also require surface finish restoration. We are proposing this AD to detect and correct scribe lines, which can develop into fatigue cracks in the skin and cause rapid decompression of the airplane.

## Notices in this docket

- Feb 10, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-02717, comments due Mar 27, 2014 (https://www.federalregister.gov/documents/2014/02/10/2014-02717/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.