# Airworthiness Directives; Boeing Model 747-200F, 747-200C, 747-400, 747-400D, and 747-400F Series Airplanes
> **Rule** · Final rule. · Published 2006-03-02 · Effective 2006-04-06 · 71 FR 10605
## Document
- **Document number:** 06-1828
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 71 FR 10605
- **Publication date:** 2006-03-02
- **Effective date:** 2006-04-06
- **FAA docket:** Docket No. FAA-2005-22526
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 747-200F, 747-200C, 747-400, 747-400D, and 747-400F series airplanes. This AD requires repetitive inspections for cracking of certain fuselage internal structure, and repair if necessary. This AD results from fatigue tests and analysis that identified areas of the fuselage where fatigue cracks can occur. We are issuing this AD to prevent loss of the structural integrity of the fuselage, which could result in rapid depressurization of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/03/02/06-1828/airworthiness-directives-boeing-model-747-200f-747-200c-747-400-747-400d-and-747-400f-series)
---
*AI Analytics · CC0 1.0*