# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2014-11-06 · Effective 2014-12-11 · 79 FR 65885
## Document
- **Document number:** 2014-26330
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 79 FR 65885
- **Publication date:** 2014-11-06
- **Effective date:** 2014-12-11
- **FAA docket:** Docket No. FAA-2014-0288
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-20, and DC-9-30 series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the improved (shot-peened) aft fuselage non-ventral pressure bulkhead tee is subject to widespread fatigue damage (WFD). This AD requires repetitive inspections for cracking of the improved (shot-peened) non-ventral aft pressure bulkhead tees, and replacement if necessary. We are issuing this AD to detect and correct fatigue cracking of the improved (shot-peened) non-ventral aft pressure bulkhead tees connecting the bulkhead web to the fuselage, which could result in reduced structural integrity and rapid decompression of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/11/06/2014-26330/airworthiness-directives-the-boeing-company-airplanes)
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