# Airworthiness Directives; Boeing Model 747 Airplanes
> **Rule** · Final rule; correction. · Published 2007-09-21 · Effective 2007-09-21 · 72 FR 53923
## Document
- **Document number:** E7-18472
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 72 FR 53923
- **Publication date:** 2007-09-21
- **Effective date:** 2007-09-21
- **FAA docket:** Docket No. FAA-2006-26441
## Abstract

The FAA is correcting a typographical error in an existing airworthiness directive (AD) that was published in the Federal Register on July 30, 2007 (72 FR 41438). The error resulted in certain compliance times being mislabeled as units of flight cycles instead of flight hours. This AD applies to all Boeing Model 747 airplanes. This AD requires an inspection of the No. 2 and No. 3 windows on the left and right sides of the airplane to determine their part numbers, and related investigative and corrective actions if necessary.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/09/21/E7-18472/airworthiness-directives-boeing-model-747-airplanes)
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