# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2013-12-27 · Effective 2014-01-31 · 78 FR 78703
## Document
- **Document number:** 2013-30779
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 78703
- **Publication date:** 2013-12-27
- **Effective date:** 2014-01-31
- **FAA docket:** Docket No. FAA-2013-0706
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-30, and DC-9-40 series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the aft pressure bulkhead web area is subject to widespread fatigue damage (WFD). This AD requires modifying the aft pressure bulkhead. The modification includes inspecting for cracks around the rivet holes, and repair of any cracking. We are issuing this AD to prevent fatigue cracking of the aft pressure bulkhead, which could result in reduced structural integrity of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/12/27/2013-30779/airworthiness-directives-the-boeing-company-airplanes)
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