# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2017-11-20 · Effective 2017-12-26 · 82 FR 55037
## Document
- **Document number:** 2017-24732
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 55037
- **Publication date:** 2017-11-20
- **Effective date:** 2017-12-26
- **FAA docket:** Docket No. FAA-2017-0773
## Abstract

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports of cracks found in the lower chord of the left wing rear spar. This AD requires repetitive inspections for cracking of the lower chord of the rear spar and lower aft skin 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/2017/11/20/2017-24732/airworthiness-directives-the-boeing-company-airplanes)
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