# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2018-09-28 · Effective 2018-11-02 · 83 FR 48927
## Document
- **Document number:** 2018-20918
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 48927
- **Publication date:** 2018-09-28
- **Effective date:** 2018-11-02
- **FAA docket:** Docket No. FAA-2018-0504
## Abstract

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 707, 720, and 720B series airplanes. This AD was prompted by a report indicating that a fracture of the midspar fitting resulted in the separation of the inboard strut and engine from the airplane, and a determination that existing inspections are not sufficient for timely detection of cracking. This AD requires repetitive inspections of certain nacelle strut spar and overwing fittings, and diagonal braces and associated fittings; replacement of the diagonal brace assembly on certain airplanes; and applicable related investigative and corrective actions. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/09/28/2018-20918/airworthiness-directives-the-boeing-company-airplanes)
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