# Proposed AD FAA-2011-0644: The Boeing Company Model 777 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-08-09
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 29, 2011, 76 FR 38072
- Comments due: August 15, 2011
- Became: [AD 2012-08-09](https://openairdocs.org/ad/2012-08-09)
- Docket: FAA-2011-0644 (https://www.regulations.gov/docket/FAA-2011-0644, where comments are filed)
- Project: 2010-NM-265-AD
- FR document: 2011-16368
- Official PDF: https://openairdocs.org/files/sha256/82/64/826479a12770de5d319ae42a9b5da92a788da9e2c02b785a01cf461f317c05ea (from https://www.govinfo.gov/content/pkg/FR-2011-06-29/pdf/2011-16368.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/06/29/2011-16368/airworthiness-directives-the-boeing-company-model-777-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD2D7CB0EAAC5FE2862578BE004B49ED.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0644

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require repetitive detailed inspection and high frequency eddy current (HFEC) inspections for cracks of the wing center section (WCS) spanwise beams, and repair if necessary. This proposed AD was prompted by reports of cracks found in the web pockets of the WCS spanwise beams. We are proposing this AD to detect and correct cracking in the WCS spanwise beams, which could result in reduced structural integrity of the wings.

## Notices in this docket

- Jun 29, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-16368, comments due Aug 15, 2011 (https://www.federalregister.gov/documents/2011/06/29/2011-16368/airworthiness-directives-the-boeing-company-model-777-airplanes)

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