# Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP Series Airplanes
> **Rule** · Final rule; correction. · Published 2009-05-18 · Effective 2009-04-02 · 74 FR 23110
## Document
- **Document number:** E9-11280
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 74 FR 23110
- **Publication date:** 2009-05-18
- **Effective date:** 2009-04-02
- **FAA docket:** Docket No. FAA-2008-0731
## Abstract

The FAA is correcting typographical errors in an existing airworthiness directive (AD) that was published previously in the Federal Register. The error resulted in two incorrect paragraph references. This AD applies to certain Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This AD requires repetitive detailed inspections of the aft pressure bulkhead for indications of "oil cans" and previous oil can repairs at reduced compliance times, and corrective actions if necessary.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/05/18/E9-11280/airworthiness-directives-boeing-model-747-100-747-100b-747-100b-sud-747-200b-747-200c-747-200f)
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