# Proposed AD FAA-2012-0727: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-21-13
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 1, 2012, 77 FR 45518
- Comments due: September 17, 2012
- Became: [AD 2012-21-13](https://openairdocs.org/ad/2012-21-13)
- Docket: FAA-2012-0727 (https://www.regulations.gov/docket/FAA-2012-0727, where comments are filed)
- Project: 2012-NM-012-AD
- FR document: 2012-18622
- Official PDF: https://openairdocs.org/files/sha256/71/d1/71d14832def081c05bc40e7bf001c448fcb94d7eeab56027eb8404f5425b9310 (from https://www.govinfo.gov/content/pkg/FR-2012-08-01/pdf/2012-18622.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/08/01/2012-18622/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0745A8A375F924B886257A4D00495D63.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0727

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC- 9-83 (MD-83), DC-9-87 (MD-87), and MD-88 airplanes. This proposed AD was prompted by reports of fatigue cracks found in Stringer 11 at the outboard flap, inboard drive hinge at Station Xrs=164.000. This proposed AD would require repetitive inspections for cracks in Stringer 11, and a splice repair if necessary; and repetitive post-repair inspections, and repair if necessary. We are proposing this AD to detect and correct such cracking, which could result in the wing structure not supporting the limit load condition, which could lead to loss of structural integrity of the wing.

## Notices in this docket

- Aug 1, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-18622, comments due Sep 17, 2012 (https://www.federalregister.gov/documents/2012/08/01/2012-18622/airworthiness-directives-the-boeing-company-airplanes)

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