# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2013-04-19 · Effective 2013-05-24 · 78 FR 23465
## Document
- **Document number:** 2013-08905
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 23465
- **Publication date:** 2013-04-19
- **Effective date:** 2013-05-24
- **FAA docket:** Docket No. FAA-2012-0938
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-600 series airplanes. This AD was prompted by reports of early fatigue cracks at chem-mill areas on the crown skin panels. This AD requires repetitive inspections for cracking of the fuselage skin at certain locations at chem-mill areas, and repair if necessary. We are issuing 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/04/19/2013-08905/airworthiness-directives-the-boeing-company-airplanes)
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