# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2017-02-07 · Effective 2017-03-14 · 82 FR 9489
## Document
- **Document number:** 2017-01341
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 9489
- **Publication date:** 2017-02-07
- **Effective date:** 2017-03-14
- **FAA docket:** Docket No. FAA-2016-7261
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-200B, 747-300, 747-400, 747-400D, and 747- 400F series airplanes. This AD was prompted by a report of cracking in both the aluminum strut side skin, and corrosion resistant steel (CRES) outer spring beam support fitting. This AD requires inspections, related investigative and corrective actions, and a fastener installation modification. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/02/07/2017-01341/airworthiness-directives-the-boeing-company-airplanes)
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