# Proposed AD FAA-2007-0270: Boeing Model 757-200, -200PF, and - 200CB Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-06-14
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 17, 2007, 72 FR 71277
- Comments due: January 31, 2008
- Became: [AD 2008-06-14](https://openairdocs.org/ad/2008-06-14)
- Docket: FAA-2007-0270 (https://www.regulations.gov/docket/FAA-2007-0270, where comments are filed)
- Project: 2007-NM-211-AD
- FR document: E7-24383
- Official PDF: https://openairdocs.org/files/sha256/29/21/29213eeec07ab2ad3a2882cf29c08b913cd42a8ffa067b67d787659296a95e8b (from https://www.govinfo.gov/content/pkg/FR-2007-12-17/pdf/E7-24383.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/12/17/E7-24383/airworthiness-directives-boeing-model-757-200--200pf-and--200cb-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6B295E78DBA5EED1862573B4006DC508.0001
- Page: https://openairdocs.org/proposed/FAA-2007-0270

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 757-200, -200PF, and -200CB series airplanes. This proposed AD would require doing an ultrasound inspection for disbonded tear straps not mechanically fastened to the skin, and related investigative and corrective actions, if necessary. This proposed AD results from reports indicating that bonded skin panels may not have been correctly anodized in phosphoric acid before the tear strap doubler was bonded to the skin. We are proposing this AD to detect and correct a weak bond between the skin and tear strap. Such disbonding could reduce the ability of the skin to resist cracks and could adversely affect the structural integrity of the airplane.

## Notices in this docket

- Dec 17, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-24383, comments due Jan 31, 2008 (https://www.federalregister.gov/documents/2007/12/17/E7-24383/airworthiness-directives-boeing-model-757-200--200pf-and--200cb-series-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.