# Airworthiness Directives; Pratt & Whitney (PW) JT9D-7R4 Series Turbofan Engines; Correction
> **Rule** · Final rule; correction. · Published 2009-05-18 · Effective 2009-05-18 · 74 FR 23109
## Document
- **Document number:** E9-11477
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney (PW) JT9D-7R4 Series Turbofan
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 74 FR 23109
- **Publication date:** 2009-05-18
- **Effective date:** 2009-05-18
- **FAA docket:** Docket No. FAA-2006-23742
## Abstract

The FAA is correcting airworthiness directive (AD) 2009-10-01, which was previously published in the Federal Register. That AD applies to PW JT9D-7R4 series turbofan engines. In the Federal Register, the AD number in the CFR citation of the headings section is incorrect. This document corrects that AD number. In all other respects, the original document remains the same.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/05/18/E9-11477/airworthiness-directives-pratt-and-whitney-pw-jt9d-7r4-series-turbofan-engines-correction)
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