# Airworthiness Directives; Boeing Model 747-100B SUD, -300, -400, and -400D Series Airplanes
> **Rule** · Final rule. · Published 2005-03-11 · Effective 2005-04-15 · 70 FR 12113
## Document
- **Document number:** 05-4410
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 12113
- **Publication date:** 2005-03-11
- **Effective date:** 2005-04-15
- **FAA docket:** Docket No. FAA-2004-19470
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-100B SUD, -300, -400, and -400D series airplanes. This AD requires a one-time inspection for discrepancies of the fuselage frame to tension tie joints at body stations (BS) 1120 through 1220 and to determine if steel splice plates are installed on the fuselage frames, and related investigative and corrective actions. This AD is prompted by reports indicating that severed tension ties were found at the fuselage frame joints at BS 1120 and 1140. We are issuing this AD to prevent fatigue cracking of the fuselage frame to tension tie joints, which could result in severing of the tension ties and consequent rapid decompression of the airplane fuselage.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/03/11/05-4410/airworthiness-directives-boeing-model-747-100b-sud--300--400-and--400d-series-airplanes)
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