# Proposed AD FAA-2009-0553: Boeing Model 747-100, 747-100B, 747- 200B, 747-200C, 747-200F, and 747SR Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-24-17
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 23, 2009, 74 FR 29630
- Comments due: August 7, 2009
- Became: [AD 2009-24-17](https://openairdocs.org/ad/2009-24-17)
- Docket: FAA-2009-0553 (https://www.regulations.gov/docket/FAA-2009-0553, where comments are filed)
- Project: 2008-NM-199-AD
- FR document: E9-14677
- Official PDF: https://openairdocs.org/files/sha256/66/70/66701a24808341a69ff60b3b9016b4aaa58b5886b797f774328d2162551c7f38 (from https://www.govinfo.gov/content/pkg/FR-2009-06-23/pdf/E9-14677.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/06/23/E9-14677/airworthiness-directives-boeing-model-747-100-747-100b-747-200b-747-200c-747-200f-and-747sr-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B3C47E8104DE3716862575DE004ECA05.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0553

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, and 747SR series airplanes. This proposed AD would require 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 proposed 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 proposing 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.

## Notices in this docket

- Jun 23, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-14677, comments due Aug 7, 2009 (https://www.federalregister.gov/documents/2009/06/23/E9-14677/airworthiness-directives-boeing-model-747-100-747-100b-747-200b-747-200c-747-200f-and-747sr-series)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.