# Airworthiness Directives; the Boeing Company Airplanes
> **Rule** · Final rule. · Published 2018-09-10 · Effective 2018-10-15 · 83 FR 45548
## Document
- **Document number:** 2018-18740
- **Category:** airworthiness
- **Manufacturer:** the Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 45548
- **Publication date:** 2018-09-10
- **Effective date:** 2018-10-15
- **FAA docket:** Docket No. FAA-2018-0273
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by several reports of cracks in a certain floor beam lower chord at door stop fitting No. 1 of the forward airstair door cutout. This AD requires repetitive inspections for any cracks and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/09/10/2018-18740/airworthiness-directives-the-boeing-company-airplanes)
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