# Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, and 747SR Series Airplanes
> **Rule** · Final rule. · Published 2009-12-04 · Effective 2010-01-08 · 74 FR 63590
## Document
- **Document number:** E9-28552
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 74 FR 63590
- **Publication date:** 2009-12-04
- **Effective date:** 2010-01-08
- **FAA docket:** Docket No. FAA-2009-0553
## Abstract

We are issuing a new airworthiness directive (AD) for certain Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, and 747SR series airplanes. This AD requires a one-time general visual inspection for missing fasteners in certain stringer-to-stringer clip joints at the station (STA) 760 through STA 940 frames, and related investigative and corrective actions if necessary. This AD results from a report of broken and cracked frame shear ties, cracks on the frame doubler and frame web, and missing fasteners in the stringer (S) -10L stringer-to- stringer clip joint at the STA 820 frame. We are issuing this AD to detect and correct missing fasteners in the stringer-to-stringer clip joints, which could result in shear tie and skin cracks and rapid in- flight decompression of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/12/04/E9-28552/airworthiness-directives-boeing-model-747-100-747-100b-747-200b-747-200c-747-200f-and-747sr-series)
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