# Proposed AD FAA-2012-0937: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-08-15
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 18, 2012, 77 FR 57529
- Comments due: November 2, 2012
- Became: [AD 2013-08-15](https://openairdocs.org/ad/2013-08-15)
- Docket: FAA-2012-0937 (https://www.regulations.gov/docket/FAA-2012-0937, where comments are filed)
- Project: 2011-NM-270-AD
- FR document: 2012-22890
- Official PDF: https://openairdocs.org/files/sha256/f1/7b/f17be1cfa06283484e696c6e39f4da86404895bf49b1b36b7eda8bbbd2b455bd (from https://www.govinfo.gov/content/pkg/FR-2012-09-18/pdf/2012-22890.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/09/18/2012-22890/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/26C6EEEEBC32C80F86257A7D0050B201.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0937

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-800 series airplanes. This proposed AD was prompted by reports of early fatigue cracks at chem- mill areas on the crown skin panels. This proposed AD would require repetitive inspections for cracking of the fuselage skin along chem- mill steps at certain crown skin and shear wrinkle areas, and repair if necessary. We are proposing this AD to detect and correct fatigue cracking of the skin panel at the specified chem-mill step locations, which could result in rapid decompression of the airplane.

## Notices in this docket

- Sep 18, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-22890, comments due Nov 2, 2012 (https://www.federalregister.gov/documents/2012/09/18/2012-22890/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.